IMatchable (MatchNode matchNode, int index) { IMatchable object = super.findObject(matchNode, index); if (object != null) { return object; } if (matchNode.getType() == MatchNode.MATCHNODE_EXPRENT) { String position = (String)matchNode.getRuleValue(MatchProperties.EXPRENT_POSITION); if ("head".equals(position)) { return getHeadexprent(); } } return null; }