docs: def show_content(self):
          """Check if content of library is to be shown
          
          Content is shown, if the uppermost state's meta flag "show_content" is True and the library hierarchy depth
          (up to MAX_VISIBLE_LIBRARY_HIERARCHY level) is not to high.
          
          :return: Whether the content is to be shown
          :rtype: bool
          """
          current_hierarchy_depth = self.state.library_hierarchy_depth
          max_hierarchy_depth = global_gui_config.get_config_value("MAX_VISIBLE_LIBRARY_HIERARCHY", 2)
          if current_hierarchy_depth >= max_hierarchy_depth:
              return False
          if current_hierarchy_depth > 1:
              uppermost_lib_state = self.state.get_uppermost_library_root_state().parent
              uppermost_lib_state_m = self.get_state_machine_m().get_state_model_by_path(uppermost_lib_state.get_path())
          else:
              uppermost_lib_state_m = self
          uppermost_lib_meta = uppermost_lib_state_m.meta
          return False if 'show_content' not in uppermost_lib_meta['gui'] else uppermost_lib_meta['gui']['show_content']