Function is_cell_box_layer

src/laybasic/laybasic/layLayerProperties.h:544–547

* @brief cell_box layer attribute * * This attribute is true, if the layer provides cell boxes. */

   *  This attribute is true, if the layer provides cell boxes.
   */
  bool is_cell_box_layer () const
  {
    return source (true).special_purpose () == lay::ParsedLayerSource::SP_CellFrame;
  }
  
  /**
   *  @brief Set the transparency state