3 declare(strict_types=1);
 Used for storage og multiple values E.g RRULE:FREQ=WEEKLY;COUNT=20;INTERVAL=2;BYDAY=TU. 
 
__construct(string $a_name, string $a_value)
ilICalValue constructor. 
 
__construct(Container $dic, ilPlugin $plugin)
 
Abstract base class for all ical items (Component, Parameter and Value)