tasks_patch_sync
Description:
public bool tasks_patch_sync (string tasklist_id, string task_id, Builder task_properties, out Object out_patched_task, Cancellable? cancellable = null) throws Error
  
  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.
Parameters:
| 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   | 
      
| cancellable | 
           optional Cancellable object, or   | 
      
Returns:
| 
           whether succeeded  |