Changes properties of a task list tasklist_id.
If not null, free the out_patched_tasklist with
unref, when no longer needed.
| this |
an GDataSession |
| tasklist_id |
id of a task list |
| tasklist_properties |
task list properties to change |
| out_patched_tasklist |
where to store patched task list, or null |
| cancellable |
optional Cancellable object, or null |
|
whether succeeded |