fix: addListener returns remover function

Author: mfazekas

android/src/main/java/com/margelo/nitro/rive/HybridViewModelListProperty.kt

@@ -56,8 +56,9 @@ class HybridViewModelListProperty(private val listProperty: ViewModelListPropert
     return true
   }
 
-  override fun addListener(onChanged: () -> Unit) {
-    listeners.add { _: Unit -> onChanged() }
+  override fun addListener(onChanged: () -> Unit): () -> Unit {
+    val remover = addListenerInternal { _ -> onChanged() }
     ensureValueListenerJob(listProperty.valueFlow.map { })
+    return remover
   }
 }

ios/HybridViewModelListProperty.swift

@@ -56,7 +56,7 @@ class HybridViewModelListProperty: HybridViewModelListPropertySpec, ValuedProper
     return true
   }
 
-  func addListener(onChanged: @escaping () -> Void) throws {
-    try addListener(onChanged: { _ in onChanged() })
+  func addListener(onChanged: @escaping () -> Void) throws -> () -> Void {
+    helper.addListener({ _ in onChanged() })
   }
 }

nitrogen/generated/android/c++/JHybridViewModelListPropertySpec.cpp

@@ -149,6 +149,6 @@ export interface ViewModelListProperty
   removeInstanceAt(index: number): void;
   /** Swap the instances at the given indices, returns true if successful */
   swap(index1: number, index2: number): boolean;
-  /** Add a listener to be notified when the list changes */
-  addListener(onChanged: () => void): void;
+  /** Add a listener to be notified when the list changes. Returns a function to remove the listener. */
+  addListener(onChanged: () => void): () => void;
 }