diff --git a/src/Config.ts b/src/Config.ts
index e13677b6b..ba37ecb02 100644
--- a/src/Config.ts
+++ b/src/Config.ts
@@ -310,6 +310,7 @@ export class Config implements ConfigParams, ParserConfig {
   }
 
   private static warnDeprecatedOptions(options: Partial<ConfigParams>) {
+    // an example of deprecation warning
     // Config.warnDeprecatedIfUsed(options.binarySearchThreshold, 'binarySearchThreshold', '1.1')
   }