docs: public DrawerBuilder withStickyFooter(@LayoutRes int stickyFooterRes) {
          if (mActivity == null) {
              throw new RuntimeException("please pass an activity first to use this call");
          }
  
          if (stickyFooterRes != -1) {
              //i know there should be a root, bit i got none here
              this.mStickyFooterView = (ViewGroup) mActivity.getLayoutInflater().inflate(stickyFooterRes, null, false);
          }
  
          return this;
      }