Changes properties task_properties of a task task_id in the task list tasklist_id.
If not null, free the out_patched_task with
unref, when no longer needed.
| this |
an GDataSession |
| tasklist_id |
id of a task list |
| task_id |
id of a task |
| task_properties |
task properties to change |
| out_patched_task |
where to set patches task, or null |
| cancellable |
optional Cancellable object, or null |
|
whether succeeded |