Gets a component identified by uid, and optionally by the rid, from the this.
The returned out_icalstring should be freed with g_free, when no
longer needed.
| this |
an CalCache |
| uid |
a UID of the component |
| rid |
an optional Recurrence-ID |
| out_icalstring |
return location for an iCalendar string |
| cancellable |
optional Cancellable object, or null |
|
Whether succeeded. |