Puts the zone into the this using its timezone ID as an identificator.
The function adds a new or replaces existing, if any such already exists in the this. The function
does nothing and returns true, when the passed-in zone is libical builtin timezone.
| this |
an CalCache |
| zone |
an Timezone to put |
| inc_ref_counts |
how many refs to add, or 0 to have it stored forever |
| cancellable |
optional Cancellable object, or null |
|
Whether succeeded. |