@Override
  public AnimatedDrawableFrameInfo getFrameInfo(int frameNumber) {
    return new AnimatedDrawableFrameInfo(
        frameNumber,
        0,
        0,
        mWidth,
        mHeight,
        AnimatedDrawableFrameInfo.BlendOperation.NO_BLEND,
        AnimatedDrawableFrameInfo.DisposalMethod.DISPOSE_DO_NOT);
  }
Implementation of {@link AnimatedDrawableBackend} for unit tests.
animated-base/src/test/java/com/facebook/imagepipeline/animated/testing/TestAnimatedDrawableBackend.java