private static SparseIntArray getBucketSizes() {
    final SparseIntArray bucketSizes = new SparseIntArray();
    bucketSizes.put(4, 10);
    bucketSizes.put(8, 10);
    bucketSizes.put(16, 10);
    bucketSizes.put(32, 10);
    return bucketSizes;
  }
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