ListBox patterns = new ListBox();
for ( Object o : dt.actionCols ) {
ActionCol col = (ActionCol) o;
if ( col instanceof ActionInsertFactCol ) {
ActionInsertFactCol c = (ActionInsertFactCol) col;
if ( !vars.contains( c.boundName ) ) {
patterns.addItem( c.factType + " [" + c.boundName + "]",
c.factType + " " + c.boundName );
vars.add( c.boundName );
}