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