Fixing crash when cancelAnimaiton happens while we are aboutto enter long-swipe

            return;

        }

        RemoteAnimationTargetSet targetSet = mRecentsAnimationWrapper.targetSet;

        if (targetSet == null) {

            // This can happen when cancelAnimation comes on the background thread, while we are

            // processing the long swipe on the UI thread.

            return;

        }

        mLongSwipeController = mActivityControlHelper.getLongSwipeController(

                mActivity, mRecentsAnimationWrapper.targetSet);

        onLongSwipeDisplacementUpdated();