diff --git a/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/ExecutionResult.java b/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/ExecutionResult.java
index 41669f10a9144..25c8af4929ec4 100644
--- a/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/ExecutionResult.java
+++ b/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/ExecutionResult.java
@@ -18,14 +18,13 @@
  */
 package org.apache.pulsar.functions.spawner;
 
-import java.io.ByteArrayOutputStream;
 import java.util.concurrent.TimeoutException;
 
 /**
  * An interface that represents the result of a function call.
  */
 public interface ExecutionResult {
-
+    
     Exception getUserException();
 
     TimeoutException getTimeoutException();
diff --git a/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/LimitsConfig.java b/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/LimitsConfig.java
index 9fbf0dc806d16..0db1a06db06f0 100644
--- a/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/LimitsConfig.java
+++ b/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/LimitsConfig.java
@@ -18,26 +18,17 @@
  */
 package org.apache.pulsar.functions.spawner;
 
+import lombok.*;
+
 /**
  * This represents the config related to the resource limits of function calls
  */
+@Data
+@Setter
+@Getter
+@EqualsAndHashCode
+@ToString
 class LimitsConfig {
     private int timeBudgetInMs;
     private int maxMemory;
-
-    public int getTimeBudgetInMs() {
-        return timeBudgetInMs;
-    }
-
-    public void setTimeBudgetInMs(int timeBudgetInMs) {
-        this.timeBudgetInMs = timeBudgetInMs;
-    }
-
-    public int getMaxMemory() {
-        return maxMemory;
-    }
-
-    public void setMaxMemory(int maxMemory) {
-        this.maxMemory = maxMemory;
-    }
 }
\ No newline at end of file
diff --git a/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/Spawner.java b/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/Spawner.java
index ebb5a28cf98f7..2a4a533d50c0b 100644
--- a/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/Spawner.java
+++ b/pulsar-functions/src/main/java/org/apache/pulsar/functions/spawner/Spawner.java
@@ -23,17 +23,13 @@
  */
 package org.apache.pulsar.functions.spawner;
 
-import org.apache.pulsar.client.api.*;
-import org.apache.pulsar.functions.instance.JavaExecutionResult;
-import org.apache.pulsar.functions.instance.JavaInstance;
+
 import org.apache.pulsar.functions.instance.JavaInstanceConfig;
 import org.apache.pulsar.functions.runtime.container.FunctionContainer;
 import org.apache.pulsar.functions.runtime.container.ThreadFunctionContainerFactory;
-import org.apache.pulsar.functions.runtime.functioncache.FunctionCacheManager;
-import org.apache.pulsar.functions.runtime.functioncache.FunctionCacheManagerImpl;
 import org.apache.pulsar.functions.subscribermanager.SubscriberManager;
 
-class Spawner {
+public class Spawner {
     private LimitsConfig limitsConfig;
     private AssignmentInfo assignmentInfo;
     private String pulsarBrokerRootUrl;