protected static String getString(Statement s) {
   return AssemblerHelp.getString(s);
 }
 protected static String getUniqueString(Resource root, Property property) {
   Statement s = getUniqueStatement(root, property);
   return s == null ? null : AssemblerHelp.getString(s);
 }
 protected static Resource getResource(Statement s) {
   return AssemblerHelp.getResource(s);
 }