MPTask mpTask = agg.getComposition ().getCombinedTask (); if (mpTask == null) error ("no mp task on aggregation of " + agg.getTask().getUID()); else { removeFromDirectObject (agg.getTask(), mpTask); }
  public void handleRemovedAggregation (Aggregation agg) {	    Vector removedTasks = new Vector();    removedTasks.add(agg.getTask());    handleRemovedTasks(removedTasks.elements());  }