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