code: function(role, view, template_arguments) {
  
  		var result = false;
  
  		if (role in this._role_handlers) {
  
  			this[this._role_handlers[role]](view, template_arguments);
  			result = true;
  
  		}
  
  		return result;
  
  	}
docs: Handle a view with a role in this widget
  @param {string} role Role name
  @param {Lava.view.Abstract} view
  @param {Array.<*>} template_arguments
  @returns {boolean} <kw>true</kw>, if the role was handled, and <kw>false</kw> otherwise