* @param schemaObject The SchemaObject we are looking for
* @return true if there is at least one SchemaObjetc referencing the given one
*/
public boolean isReferenced( SchemaObject schemaObject )
{
SchemaObjectWrapper wrapper = new SchemaObjectWrapper( schemaObject );
Set<SchemaObjectWrapper> set = usedBy.get( wrapper );
boolean referenced = ( set != null ) && ( set.size() != 0 );