code: @NonNull
      public IconicsAnimationProcessor start() {
          mAnimator.setInterpolator(mInterpolator);
          mAnimator.setDuration(mDuration);
          mAnimator.setRepeatCount(mRepeatCount);
          mAnimator.setRepeatMode(mRepeatMode);
  
          if (mDrawable != null) {
              mIsStartRequested = false;
              mAnimator.start();
          } else {
              mIsStartRequested = true;
          }
          return this;
      }
docs: Starts the animation, if processor is attached to drawable, otherwise sets flag to start
  animation immediately after attaching