Creates a new task task in the task list tasklist_id.
The out_inserted_task should be freed with unref, when
no longer needed.
| this |
an GDataSession |
| tasklist_id |
id of a task list |
| task |
a Builder with the task object |
| parent_task_id |
parent task identifier, or null to create at the top-level |
| previous_task_id |
previous sibling task identifier, or null to create at the first position among its siblings |
| out_inserted_task |
the created task |
| cancellable |
optional Cancellable object, or null |
|
whether succeeded |