@Override
  public AshmemMemoryChunk alloc(int bucketedSize) {
    return new FakeAshmemMemoryChunk(bucketedSize);
  }
A 'fake' {@link com.facebook.memory.ashmem.AshmemMemoryChunk} instance as a test helper
memory-types/ashmem/src/test/java/com/facebook/imagepipeline/testing/FakeAshmemMemoryChunkPool.java