code: @Override
      public void visit(final String name, final Object value) {
          buf.setLength(0);
          buf.append("av").append(id).append(".visit(");
          appendConstant(buf, name);
          buf.append(", ");
          appendConstant(buf, value);
          buf.append(");\n");
          text.add(buf.toString());
      }
docs: ------------------------------------------------------------------------