code: public void addStickyFooterItem(@NonNull IDrawerItem drawerItem) {
          if (mDrawerBuilder.mStickyDrawerItems == null) {
              mDrawerBuilder.mStickyDrawerItems = new ArrayList<>();
          }
          mDrawerBuilder.mStickyDrawerItems.add(drawerItem);
  
          DrawerUtils.rebuildStickyFooterView(mDrawerBuilder);
      }
docs: Add a footerDrawerItem at the end
  
  @param drawerItem