code: function(widget_config, storage_name, item_name, value) {
  
  		if (!(storage_name in widget_config)) widget_config[storage_name] = {};
  		if (Lava.schema.DEBUG && (item_name in widget_config[storage_name])) Lava.t("Duplicate item in storage: " + item_name);
  		widget_config[storage_name][item_name] = value;
  
  	}
docs: Utility method used in parsers and sugar
  
  @param {_cWidget} widget_config
  @param {string} storage_name
  @param {string} item_name
  @param {*} value