return this.group_types;
if (this.types == null) { types         = new LinkedHashSet(); Iterator iter = this.group_types.iterator(); while (iter.hasNext()) { try { GroupType type = (GroupType) iter.next(); types.add( GroupTypeFinder.find( type.toString() ) ); } catch (SchemaException eS) { LOG.error(eS.getMessage()); } } } return this.types;
  private Set getGroup_types() {    return this.group_types;  }