public function getToolbarButton($key)
	{
		if (!isset($this->toolbar_buttons[$key])) {
			throw new DataGridException("There is no toolbar button at key [$key] defined.");
		}

		return $this->toolbar_buttons[$key];
	}
public function getToolbarButton($key)
	{
		if (!isset($this->toolbar_buttons[$key])) {
			throw new DataGridException("There is no toolbar button at key [$key] defined.");
		}

		return $this->toolbar_buttons[$key];
	}
public function getToolbarButton ( $ key ) { if ( ! isset ( $ this -> toolbar_buttons [ $ key ] ) ) { throw new DataGridException ( "There is no toolbar button at key [$key] defined." ) ; } return $ this -> toolbar_buttons [ $ key ] ; }
Get existing toolbar button
@param  string  $key
@return ToolbarButton
@throws DataGridException
Get existing toolbar button