ublaboo / datagrid

	 * @param string|callable $class

	 * @return static

	 */

	public function setClass($class)

	{

		if (!is_string($class) && !is_callable($class)) {

			throw new DataGridException(

				'Action class has to be either string or callback, that will return string'

			);

		}

		$this->class = $class;

		return $this;

	}

	/**

	 * @param string|callable $icon

	 * @return static|callable

	 */

	public function setIcon($icon)

	{

		if (!is_string($icon) && !is_callable($icon)) {

			throw new DataGridException(

				'Action icon has to be either string or callback, that will return string'

			);

		}

		$this->icon = $icon;

		return $this;

	}

	/**