feat: update return type for requestedToolConfirmations getter and setter to Map from ConcurrentMap

core/src/main/java/com/google/adk/events/EventActions.java

@@ -165,13 +165,20 @@ public void setRequestedAuthConfigs(
   }
 
   @JsonProperty("requestedToolConfirmations")
-  public ConcurrentMap<String, ToolConfirmation> requestedToolConfirmations() {
+  public Map<String, ToolConfirmation> requestedToolConfirmations() {
     return requestedToolConfirmations;
   }
 
   public void setRequestedToolConfirmations(
-      ConcurrentMap<String, ToolConfirmation> requestedToolConfirmations) {
-    this.requestedToolConfirmations = requestedToolConfirmations;
+      Map<String, ToolConfirmation> requestedToolConfirmations) {
+    if (requestedToolConfirmations == null) {
+      this.requestedToolConfirmations = new ConcurrentHashMap<>();
+    } else if (requestedToolConfirmations instanceof ConcurrentMap) {
+      this.requestedToolConfirmations =
+          (ConcurrentMap<String, ToolConfirmation>) requestedToolConfirmations;
+    } else {
+      this.requestedToolConfirmations = new ConcurrentHashMap<>(requestedToolConfirmations);
+    }
   }
 
   @JsonProperty("endOfAgent")
@@ -351,8 +358,16 @@ public Builder requestedAuthConfigs(
 
     @CanIgnoreReturnValue
     @JsonProperty("requestedToolConfirmations")
-    public Builder requestedToolConfirmations(ConcurrentMap<String, ToolConfirmation> value) {
-      this.requestedToolConfirmations = value;
+    public Builder requestedToolConfirmations(@Nullable Map<String, ToolConfirmation> value) {
+      if (value == null) {
+        this.requestedToolConfirmations = new ConcurrentHashMap<>();
+        return this;
+      }
+      if (value instanceof ConcurrentMap) {
+        this.requestedToolConfirmations = (ConcurrentMap<String, ToolConfirmation>) value;
+      } else {
+        this.requestedToolConfirmations = new ConcurrentHashMap<>(value);
+      }
       return this;
     }
 

core/src/test/java/com/google/adk/events/EventActionsTest.java

@@ -26,6 +26,7 @@
 import com.google.genai.types.Part;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -165,4 +166,27 @@ public void merge_failsOnMismatchedKeyTypesNestedInStateDelta() {
     assertThrows(
         IllegalArgumentException.class, () -> eventActions1.toBuilder().merge(eventActions2));
   }
+
+  @Test
+  public void setRequestedToolConfirmations_withConcurrentMap_usesSameInstance() {
+    ConcurrentHashMap<String, ToolConfirmation> map = new ConcurrentHashMap<>();
+    map.put("tool", TOOL_CONFIRMATION);
+
+    EventActions actions = new EventActions();
+    actions.setRequestedToolConfirmations(map);
+
+    assertThat(actions.requestedToolConfirmations()).isSameInstanceAs(map);
+  }
+
+  @Test
+  public void setRequestedToolConfirmations_withRegularMap_createsConcurrentMap() {
+    ImmutableMap<String, ToolConfirmation> map = ImmutableMap.of("tool", TOOL_CONFIRMATION);
+
+    EventActions actions = new EventActions();
+    actions.setRequestedToolConfirmations(map);
+
+    assertThat(actions.requestedToolConfirmations()).isNotSameInstanceAs(map);
+    assertThat(actions.requestedToolConfirmations()).isInstanceOf(ConcurrentMap.class);
+    assertThat(actions.requestedToolConfirmations()).containsExactly("tool", TOOL_CONFIRMATION);
+  }
 }