set_completed
  
  Description:
  public void set_completed (
int64 completed)
  
 
  
    Sets the completed property of the 
      TasksTask to the new completion time of the task, completed.
    Set completed to -1 to unset the property in the completion time of the task
    Parameters:
    
      
        | this | 
        
           a TasksTask 
         | 
      
      
        | completed | 
        
           completion time of the task, or -1 
         |