code: public final void addDivider(@Nullable final CharSequence title) {
          Divider divider = new Divider();
          divider.setTitle(title);
          adapter.add(divider);
          adaptGridViewHeight();
      }
docs: Adds a new divider to the bottom sheet.
  
  @param title
  The title of the divider, which should be added, as an instance of the type {@link
  CharSequence}, or null, if no title should be used