@Override
  protected NativeMemoryChunk alloc(int bucketedSize) {
    return new FakeNativeMemoryChunk(bucketedSize);
  }
A 'fake' {@link NativeMemoryChunkPool} instance as a test helper
memory-types/nativememory/src/test/java/com/facebook/imagepipeline/testing/FakeNativeMemoryChunkPool.java