in shimmer/src/main/java/com/facebook/shimmer/ShimmerDrawable.java [205:213]
void maybeStartShimmer() {
if (mValueAnimator != null
&& !mValueAnimator.isStarted()
&& mShimmer != null
&& mShimmer.autoStart
&& getCallback() != null) {
mValueAnimator.start();
}
}