ZeroCopyReturnValue: Add GetHandle()

common/ZeroCopyReturnValue.cpp

@@ -42,3 +42,7 @@ void ZeroCopyReturnValue::SetIndexed(bool input) {
 bool ZeroCopyReturnValue::IsIndexed() const {
     return indexed;
 }
+
+uint32_t ZeroCopyReturnValue::GetHandle() const {
+    return handle;
+}

common/ZeroCopyReturnValue.h

@@ -23,6 +23,7 @@ public:
     void SetIndexed(bool input);
 
     void *GetImage() const;
+    [[nodiscard]] uint32_t GetHandle() const;
     [[nodiscard]] size_t GetImageSize() const;
     [[nodiscard]] int64_t GetImageNumber() const;
     [[nodiscard]] bool IsIndexed() const;