public static function checkin($task = 'checkin', $alt = 'JTOOLBAR_CHECKIN', $check = true)
	{
		static::getRoot()->appendButton('Standard', 'checkin', $alt, $task, $check);
	}
public static function checkin($task = 'checkin', $alt = 'JTOOLBAR_CHECKIN', $check = true)
	{
		static::getRoot()->appendButton('Standard', 'checkin', $alt, $task, $check);
	}
public static function checkin ( $ task = 'checkin' , $ alt = 'JTOOLBAR_CHECKIN' , $ check = true ) { static :: getRoot ( ) -> appendButton ( 'Standard' , 'checkin' , $ alt , $ task , $ check ) ; }
Writes a checkin button for a given option.

@param   string   $task
@param   string   $alt
@param   boolean  $check  True if required to check that a standard list item is checked.
@return  void
Writes a checkin button for a given option .