class UmlCollaborationDiagramDefinition
!!!139140.cpp!!!	write(inout out : FileOut, in diag : UmlItem) : void
  UmlMessage::write_connectors(out, diag, 
			       (const QVector<UmlMessage>&) messages());
  UmlClassInstanceReference::write_lifelines(out, diag, instances());
  if (! messages().isEmpty()) {
    unsigned index = 0;
    
    UmlCollaborationMessage::write(out, diag, messages(), index);
  }
