docs: public void attachToRecyclerView(@Nullable RecyclerView recyclerView) {
          if (mRecyclerView == recyclerView) {
              return; // nothing to do
          }
          if (mRecyclerView != null) {
              destroyCallbacks();
          }
          mRecyclerView = recyclerView;
          if (mRecyclerView != null) {
              final Resources resources = recyclerView.getResources();
              mSwipeEscapeVelocity = resources
                      .getDimension(R.dimen.item_touch_helper_swipe_escape_velocity);
              mMaxSwipeVelocity = resources
                      .getDimension(R.dimen.item_touch_helper_swipe_escape_max_velocity);
              setupCallbacks();
          }
      }