@Override
  public boolean isStateful() {
    return false;
  }
Whether or not this image contains state for a particular view of the image (for example, the
image for an animated GIF might contain the current frame being viewed). This means that the
image should not be stored in the bitmap cache.
imagepipeline-base/src/main/java/com/facebook/imagepipeline/image/BaseCloseableImage.java