Make Guard method names more explicit (#2762)

Co-authored-by: Cijo Thomas <[email protected]>
open-telemetry · Jan 12, 2022 · 18d73c5 · 18d73c5
1 parent fc35311
commit 18d73c5
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Showing 81 changed files with 205 additions and 205 deletions.
diff --git a/src/OpenTelemetry.Api/Baggage.cs b/src/OpenTelemetry.Api/Baggage.cs
@@ -239,7 +239,7 @@ public IReadOnlyDictionary<string, string> GetBaggage()
         /// <returns>Baggage item or <see langword="null"/> if nothing was found.</returns>
         public string GetBaggage(string name)
         {
-            Guard.NullOrEmpty(name, nameof(name));
+            Guard.ThrowIfNullOrEmpty(name, nameof(name));
 
             return this.baggage != null && this.baggage.TryGetValue(name, out string value)
                 ? value

diff --git a/src/OpenTelemetry.Api/Context/Propagation/CompositeTextMapPropagator.cs b/src/OpenTelemetry.Api/Context/Propagation/CompositeTextMapPropagator.cs
@@ -35,7 +35,7 @@ public class CompositeTextMapPropagator : TextMapPropagator
         /// <param name="propagators">List of <see cref="TextMapPropagator"/> wire context propagator.</param>
         public CompositeTextMapPropagator(IEnumerable<TextMapPropagator> propagators)
         {
-            Guard.Null(propagators, nameof(propagators));
+            Guard.ThrowIfNull(propagators, nameof(propagators));
 
             this.propagators = new List<TextMapPropagator>(propagators);
         }

diff --git a/src/OpenTelemetry.Api/Context/RuntimeContext.cs b/src/OpenTelemetry.Api/Context/RuntimeContext.cs
@@ -41,7 +41,7 @@ public static class RuntimeContext
         /// <returns>The slot registered.</returns>
         public static RuntimeContextSlot<T> RegisterSlot<T>(string slotName)
         {
-            Guard.NullOrEmpty(slotName, nameof(slotName));
+            Guard.ThrowIfNullOrEmpty(slotName, nameof(slotName));
 
             lock (Slots)
             {
@@ -66,9 +66,9 @@ public static RuntimeContextSlot<T> RegisterSlot<T>(string slotName)
         /// <returns>The slot previously registered.</returns>
         public static RuntimeContextSlot<T> GetSlot<T>(string slotName)
         {
-            Guard.NullOrEmpty(slotName, nameof(slotName));
+            Guard.ThrowIfNullOrEmpty(slotName, nameof(slotName));
             var slot = GuardNotFound(slotName);
-            var contextSlot = Guard.Type<RuntimeContextSlot<T>>(slot, nameof(slot));
+            var contextSlot = Guard.ThrowIfNotOfType<RuntimeContextSlot<T>>(slot, nameof(slot));
             return contextSlot;
         }
 
@@ -127,9 +127,9 @@ public static T GetValue<T>(string slotName)
         /// <param name="value">The value to be set.</param>
         public static void SetValue(string slotName, object value)
         {
-            Guard.NullOrEmpty(slotName, nameof(slotName));
+            Guard.ThrowIfNullOrEmpty(slotName, nameof(slotName));
             var slot = GuardNotFound(slotName);
-            var runtimeContextSlotValueAccessor = Guard.Type<IRuntimeContextSlotValueAccessor>(slot, nameof(slot));
+            var runtimeContextSlotValueAccessor = Guard.ThrowIfNotOfType<IRuntimeContextSlotValueAccessor>(slot, nameof(slot));
             runtimeContextSlotValueAccessor.Value = value;
         }
 
@@ -140,9 +140,9 @@ public static void SetValue(string slotName, object value)
         /// <returns>The value retrieved from the context slot.</returns>
         public static object GetValue(string slotName)
         {
-            Guard.NullOrEmpty(slotName, nameof(slotName));
+            Guard.ThrowIfNullOrEmpty(slotName, nameof(slotName));
             var slot = GuardNotFound(slotName);
-            var runtimeContextSlotValueAccessor = Guard.Type<IRuntimeContextSlotValueAccessor>(slot, nameof(slot));
+            var runtimeContextSlotValueAccessor = Guard.ThrowIfNotOfType<IRuntimeContextSlotValueAccessor>(slot, nameof(slot));
             return runtimeContextSlotValueAccessor.Value;
         }
 

diff --git a/src/OpenTelemetry.Api/Internal/Guard.cs b/src/OpenTelemetry.Api/Internal/Guard.cs
@@ -35,7 +35,7 @@ internal static class Guard
         /// <param name="paramName">The parameter name to use in the thrown exception.</param>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Null(object value, string paramName = DefaultParamName)
+        public static void ThrowIfNull(object value, string paramName = DefaultParamName)
         {
             if (value is null)
             {
@@ -50,7 +50,7 @@ public static void Null(object value, string paramName = DefaultParamName)
         /// <param name="paramName">The parameter name to use in the thrown exception.</param>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void NullOrEmpty(string value, string paramName = DefaultParamName)
+        public static void ThrowIfNullOrEmpty(string value, string paramName = DefaultParamName)
         {
             if (string.IsNullOrEmpty(value))
             {
@@ -65,7 +65,7 @@ public static void NullOrEmpty(string value, string paramName = DefaultParamName
         /// <param name="paramName">The parameter name to use in the thrown exception.</param>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void NullOrWhitespace(string value, string paramName = DefaultParamName)
+        public static void ThrowIfNullOrWhitespace(string value, string paramName = DefaultParamName)
         {
             if (string.IsNullOrWhiteSpace(value))
             {
@@ -81,7 +81,7 @@ public static void NullOrWhitespace(string value, string paramName = DefaultPara
         /// <param name="paramName">The parameter name to use in the thrown exception.</param>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Zero(int value, string message = "Must not be zero", string paramName = DefaultParamName)
+        public static void ThrowIfZero(int value, string message = "Must not be zero", string paramName = DefaultParamName)
         {
             if (value == 0)
             {
@@ -96,9 +96,9 @@ public static void Zero(int value, string message = "Must not be zero", string p
         /// <param name="paramName">The parameter name to use in the thrown exception.</param>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void InvalidTimeout(int value, string paramName = DefaultParamName)
+        public static void ThrowIfInvalidTimeout(int value, string paramName = DefaultParamName)
         {
-            Range(value, paramName, min: Timeout.Infinite, message: $"Must be non-negative or '{nameof(Timeout)}.{nameof(Timeout.Infinite)}'");
+            ThrowIfOutOfRange(value, paramName, min: Timeout.Infinite, message: $"Must be non-negative or '{nameof(Timeout)}.{nameof(Timeout.Infinite)}'");
         }
 
         /// <summary>
@@ -113,9 +113,9 @@ public static void InvalidTimeout(int value, string paramName = DefaultParamName
         /// <param name="message">An optional custom message to use in the thrown exception.</param>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Range(int value, string paramName = DefaultParamName, int min = int.MinValue, int max = int.MaxValue, string minName = null, string maxName = null, string message = null)
+        public static void ThrowIfOutOfRange(int value, string paramName = DefaultParamName, int min = int.MinValue, int max = int.MaxValue, string minName = null, string maxName = null, string message = null)
         {
-            Range<int>(value, paramName, min, max, minName, maxName, message);
+            Range(value, paramName, min, max, minName, maxName, message);
         }
 
         /// <summary>
@@ -130,9 +130,9 @@ public static void Range(int value, string paramName = DefaultParamName, int min
         /// <param name="message">An optional custom message to use in the thrown exception.</param>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Range(double value, string paramName = DefaultParamName, double min = double.MinValue, double max = double.MaxValue, string minName = null, string maxName = null, string message = null)
+        public static void ThrowIfOutOfRange(double value, string paramName = DefaultParamName, double min = double.MinValue, double max = double.MaxValue, string minName = null, string maxName = null, string message = null)
         {
-            Range<double>(value, paramName, min, max, minName, maxName, message);
+            Range(value, paramName, min, max, minName, maxName, message);
         }
 
         /// <summary>
@@ -144,7 +144,7 @@ public static void Range(double value, string paramName = DefaultParamName, doub
         /// <returns>The value casted to the specified type.</returns>
         [DebuggerHidden]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static T Type<T>(object value, string paramName = DefaultParamName)
+        public static T ThrowIfNotOfType<T>(object value, string paramName = DefaultParamName)
         {
             if (value is not T result)
             {

diff --git a/src/OpenTelemetry.Api/Trace/SpanAttributes.cs b/src/OpenTelemetry.Api/Trace/SpanAttributes.cs
@@ -41,7 +41,7 @@ public SpanAttributes()
         public SpanAttributes(IEnumerable<KeyValuePair<string, object>> attributes)
             : this()
         {
-            Guard.Null(attributes, nameof(attributes));
+            Guard.ThrowIfNull(attributes, nameof(attributes));
 
             foreach (KeyValuePair<string, object> kvp in attributes)
             {
@@ -133,7 +133,7 @@ public void Add(string key, double[] values)
 
         private void AddInternal(string key, object value)
         {
-            Guard.Null(key, nameof(key));
+            Guard.ThrowIfNull(key, nameof(key));
 
             this.Attributes[key] = value;
         }

diff --git a/src/OpenTelemetry.Exporter.Console/ConsoleExporterHelperExtensions.cs b/src/OpenTelemetry.Exporter.Console/ConsoleExporterHelperExtensions.cs
@@ -31,7 +31,7 @@ public static class ConsoleExporterHelperExtensions
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Reliability", "CA2000:Dispose objects before losing scope", Justification = "The objects should not be disposed.")]
         public static TracerProviderBuilder AddConsoleExporter(this TracerProviderBuilder builder, Action<ConsoleExporterOptions> configure = null)
         {
-            Guard.Null(builder, nameof(builder));
+            Guard.ThrowIfNull(builder, nameof(builder));
 
             if (builder is IDeferredTracerProviderBuilder deferredTracerProviderBuilder)
             {

diff --git a/src/OpenTelemetry.Exporter.Console/ConsoleExporterLoggingExtensions.cs b/src/OpenTelemetry.Exporter.Console/ConsoleExporterLoggingExtensions.cs
@@ -30,7 +30,7 @@ public static class ConsoleExporterLoggingExtensions
         /// <returns>The instance of <see cref="OpenTelemetryLoggerOptions"/> to chain the calls.</returns>
         public static OpenTelemetryLoggerOptions AddConsoleExporter(this OpenTelemetryLoggerOptions loggerOptions, Action<ConsoleExporterOptions> configure = null)
         {
-            Guard.Null(loggerOptions, nameof(loggerOptions));
+            Guard.ThrowIfNull(loggerOptions, nameof(loggerOptions));
 
             var options = new ConsoleExporterOptions();
             configure?.Invoke(options);

diff --git a/src/OpenTelemetry.Exporter.Console/ConsoleExporterMetricsExtensions.cs b/src/OpenTelemetry.Exporter.Console/ConsoleExporterMetricsExtensions.cs
@@ -31,7 +31,7 @@ public static class ConsoleExporterMetricsExtensions
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Reliability", "CA2000:Dispose objects before losing scope", Justification = "The objects should not be disposed.")]
         public static MeterProviderBuilder AddConsoleExporter(this MeterProviderBuilder builder, Action<ConsoleExporterOptions> configure = null)
         {
-            Guard.Null(builder, nameof(builder));
+            Guard.ThrowIfNull(builder, nameof(builder));
 
             var options = new ConsoleExporterOptions();
             configure?.Invoke(options);

diff --git a/src/OpenTelemetry.Exporter.InMemory/InMemoryExporterHelperExtensions.cs b/src/OpenTelemetry.Exporter.InMemory/InMemoryExporterHelperExtensions.cs
@@ -32,8 +32,8 @@ public static class InMemoryExporterHelperExtensions
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Reliability", "CA2000:Dispose objects before losing scope", Justification = "The objects should not be disposed.")]
         public static TracerProviderBuilder AddInMemoryExporter(this TracerProviderBuilder builder, ICollection<Activity> exportedItems)
         {
-            Guard.Null(builder, nameof(builder));
-            Guard.Null(exportedItems, nameof(exportedItems));
+            Guard.ThrowIfNull(builder, nameof(builder));
+            Guard.ThrowIfNull(exportedItems, nameof(exportedItems));
 
             if (builder is IDeferredTracerProviderBuilder deferredTracerProviderBuilder)
             {

diff --git a/src/OpenTelemetry.Exporter.InMemory/InMemoryExporterLoggingExtensions.cs b/src/OpenTelemetry.Exporter.InMemory/InMemoryExporterLoggingExtensions.cs
@@ -24,8 +24,8 @@ public static class InMemoryExporterLoggingExtensions
     {
         public static OpenTelemetryLoggerOptions AddInMemoryExporter(this OpenTelemetryLoggerOptions loggerOptions, ICollection<LogRecord> exportedItems)
         {
-            Guard.Null(loggerOptions, nameof(loggerOptions));
-            Guard.Null(exportedItems, nameof(exportedItems));
+            Guard.ThrowIfNull(loggerOptions, nameof(loggerOptions));
+            Guard.ThrowIfNull(exportedItems, nameof(exportedItems));
 
             return loggerOptions.AddProcessor(new SimpleLogRecordExportProcessor(new InMemoryExporter<LogRecord>(exportedItems)));
         }

diff --git a/src/OpenTelemetry.Exporter.InMemory/InMemoryExporterMetricsExtensions.cs b/src/OpenTelemetry.Exporter.InMemory/InMemoryExporterMetricsExtensions.cs
@@ -30,8 +30,8 @@ public static class InMemoryExporterMetricsExtensions
         /// <returns>The instance of <see cref="MeterProviderBuilder"/> to chain the calls.</returns>
         public static MeterProviderBuilder AddInMemoryExporter(this MeterProviderBuilder builder, ICollection<Metric> exportedItems)
         {
-            Guard.Null(builder, nameof(builder));
-            Guard.Null(exportedItems, nameof(exportedItems));
+            Guard.ThrowIfNull(builder, nameof(builder));
+            Guard.ThrowIfNull(exportedItems, nameof(exportedItems));
 
             return builder.AddReader(new BaseExportingMetricReader(new InMemoryExporter<Metric>(exportedItems)));
         }

diff --git a/src/OpenTelemetry.Exporter.Jaeger/JaegerExporter.cs b/src/OpenTelemetry.Exporter.Jaeger/JaegerExporter.cs
@@ -50,7 +50,7 @@ public JaegerExporter(JaegerExporterOptions options)
 
         internal JaegerExporter(JaegerExporterOptions options, TProtocolFactory protocolFactory = null, IJaegerClient client = null)
         {
-            Guard.Null(options, nameof(options));
+            Guard.ThrowIfNull(options, nameof(options));
 
             this.maxPayloadSizeInBytes = (!options.MaxPayloadSizeInBytes.HasValue || options.MaxPayloadSizeInBytes <= 0)
                 ? JaegerExporterOptions.DefaultMaxPayloadSizeInBytes
@@ -122,7 +122,7 @@ public override ExportResult Export(in Batch<Activity> activityBatch)
 
         internal void SetResourceAndInitializeBatch(Resource resource)
         {
-            Guard.Null(resource, nameof(resource));
+            Guard.ThrowIfNull(resource, nameof(resource));
 
             var process = this.Process;
 

diff --git a/src/OpenTelemetry.Exporter.Jaeger/JaegerExporterHelperExtensions.cs b/src/OpenTelemetry.Exporter.Jaeger/JaegerExporterHelperExtensions.cs
@@ -35,7 +35,7 @@ public static class JaegerExporterHelperExtensions
         /// <returns>The instance of <see cref="TracerProviderBuilder"/> to chain the calls.</returns>
         public static TracerProviderBuilder AddJaegerExporter(this TracerProviderBuilder builder, Action<JaegerExporterOptions> configure = null)
         {
-            Guard.Null(builder, nameof(builder));
+            Guard.ThrowIfNull(builder, nameof(builder));
 
             if (builder is IDeferredTracerProviderBuilder deferredTracerProviderBuilder)
             {

diff --git a/src/OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs/OtlpLogExporterHelperExtensions.cs b/src/OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs/OtlpLogExporterHelperExtensions.cs
@@ -33,7 +33,7 @@ public static class OtlpLogExporterHelperExtensions
         /// <returns>The instance of <see cref="OpenTelemetryLoggerOptions"/> to chain the calls.</returns>
         public static OpenTelemetryLoggerOptions AddOtlpExporter(this OpenTelemetryLoggerOptions loggerOptions, Action<OtlpExporterOptions> configure = null)
         {
-            Guard.Null(loggerOptions);
+            Guard.ThrowIfNull(loggerOptions);
 
             return AddOtlpExporter(loggerOptions, new OtlpExporterOptions(), configure);
         }

diff --git a/...ry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/BaseOtlpGrpcExportClient.cs b/...ry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/BaseOtlpGrpcExportClient.cs
@@ -30,8 +30,8 @@ internal abstract class BaseOtlpGrpcExportClient<TRequest> : IExportClient<TRequ
     {
         protected BaseOtlpGrpcExportClient(OtlpExporterOptions options)
         {
-            Guard.Null(options, nameof(options));
-            Guard.InvalidTimeout(options.TimeoutMilliseconds, nameof(options.TimeoutMilliseconds));
+            Guard.ThrowIfNull(options, nameof(options));
+            Guard.ThrowIfInvalidTimeout(options.TimeoutMilliseconds, nameof(options.TimeoutMilliseconds));
 
             ExporterClientValidation.EnsureUnencryptedSupportIsEnabled(options);
 

diff --git a/...ry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/BaseOtlpHttpExportClient.cs b/...ry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/BaseOtlpHttpExportClient.cs
@@ -27,9 +27,9 @@ internal abstract class BaseOtlpHttpExportClient<TRequest> : IExportClient<TRequ
     {
         protected BaseOtlpHttpExportClient(OtlpExporterOptions options, HttpClient httpClient)
         {
-            Guard.Null(options, nameof(options));
-            Guard.Null(httpClient, nameof(httpClient));
-            Guard.InvalidTimeout(options.TimeoutMilliseconds, $"{nameof(options)}.{nameof(options.TimeoutMilliseconds)}");
+            Guard.ThrowIfNull(options, nameof(options));
+            Guard.ThrowIfNull(httpClient, nameof(httpClient));
+            Guard.ThrowIfInvalidTimeout(options.TimeoutMilliseconds, $"{nameof(options)}.{nameof(options.TimeoutMilliseconds)}");
 
             this.Options = options;
             this.Headers = options.GetHeaders<Dictionary<string, string>>((d, k, v) => d.Add(k, v));

diff --git a/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OtlpMetricExporterExtensions.cs b/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OtlpMetricExporterExtensions.cs
@@ -33,7 +33,7 @@ public static class OtlpMetricExporterExtensions
         /// <returns>The instance of <see cref="MeterProviderBuilder"/> to chain the calls.</returns>
         public static MeterProviderBuilder AddOtlpExporter(this MeterProviderBuilder builder, Action<OtlpExporterOptions> configure = null)
         {
-            Guard.Null(builder, nameof(builder));
+            Guard.ThrowIfNull(builder, nameof(builder));
 
             if (builder is IDeferredMeterProviderBuilder deferredMeterProviderBuilder)
             {

diff --git a/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OtlpTraceExporterHelperExtensions.cs b/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OtlpTraceExporterHelperExtensions.cs
@@ -33,7 +33,7 @@ public static class OtlpTraceExporterHelperExtensions
         /// <returns>The instance of <see cref="TracerProviderBuilder"/> to chain the calls.</returns>
         public static TracerProviderBuilder AddOtlpExporter(this TracerProviderBuilder builder, Action<OtlpExporterOptions> configure = null)
         {
-            Guard.Null(builder, nameof(builder));
+            Guard.ThrowIfNull(builder, nameof(builder));
 
             if (builder is IDeferredTracerProviderBuilder deferredTracerProviderBuilder)
             {

diff --git a/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusExporterHttpServer.cs b/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusExporterHttpServer.cs
@@ -40,7 +40,7 @@ internal sealed class PrometheusExporterHttpServer : IDisposable
         /// <param name="exporter">The <see cref="PrometheusExporter"/> instance.</param>
         public PrometheusExporterHttpServer(PrometheusExporter exporter)
         {
-            Guard.Null(exporter, nameof(exporter));
+            Guard.ThrowIfNull(exporter, nameof(exporter));
 
             this.exporter = exporter;
             if ((exporter.Options.HttpListenerPrefixes?.Count ?? 0) <= 0)

diff --git a/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusExporterMiddleware.cs b/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusExporterMiddleware.cs
@@ -38,7 +38,7 @@ internal sealed class PrometheusExporterMiddleware
         /// <param name="next"><see cref="RequestDelegate"/>.</param>
         public PrometheusExporterMiddleware(MeterProvider meterProvider, RequestDelegate next)
         {
-            Guard.Null(meterProvider, nameof(meterProvider));
+            Guard.ThrowIfNull(meterProvider, nameof(meterProvider));
 
             if (!meterProvider.TryFindExporter(out PrometheusExporter exporter))
             {

diff --git a/src/OpenTelemetry.Exporter.Prometheus/PrometheusExporterMeterProviderBuilderExtensions.cs b/src/OpenTelemetry.Exporter.Prometheus/PrometheusExporterMeterProviderBuilderExtensions.cs
@@ -30,7 +30,7 @@ public static class PrometheusExporterMeterProviderBuilderExtensions
         /// <returns>The instance of <see cref="MeterProviderBuilder"/> to chain the calls.</returns>
         public static MeterProviderBuilder AddPrometheusExporter(this MeterProviderBuilder builder, Action<PrometheusExporterOptions> configure = null)
         {
-            Guard.Null(builder, nameof(builder));
+            Guard.ThrowIfNull(builder, nameof(builder));
 
             if (builder is IDeferredMeterProviderBuilder deferredMeterProviderBuilder)
             {

diff --git a/src/OpenTelemetry.Exporter.Prometheus/PrometheusExporterOptions.cs b/src/OpenTelemetry.Exporter.Prometheus/PrometheusExporterOptions.cs
@@ -66,7 +66,7 @@ public int ScrapeResponseCacheDurationMilliseconds
             get => this.scrapeResponseCacheDurationMilliseconds;
             set
             {
-                Guard.Range(value, nameof(value), min: 0);
+                Guard.ThrowIfOutOfRange(value, nameof(value), min: 0);
 
                 this.scrapeResponseCacheDurationMilliseconds = value;
             }

diff --git a/src/OpenTelemetry.Exporter.ZPages/ZPagesExporter.cs b/src/OpenTelemetry.Exporter.ZPages/ZPagesExporter.cs
@@ -37,7 +37,7 @@ public class ZPagesExporter : BaseExporter<Activity>
         /// <param name="options">Options for the exporter.</param>
         public ZPagesExporter(ZPagesExporterOptions options)
         {
-            Guard.Null(options?.RetentionTime, $"{nameof(options)}?.{nameof(options.RetentionTime)}");
+            Guard.ThrowIfNull(options?.RetentionTime, $"{nameof(options)}?.{nameof(options.RetentionTime)}");
 
             ZPagesActivityTracker.RetentionTime = options.RetentionTime;