code: private void _includes() throws
        IOException
    {
      if (debug)
      {
        checkState(reader.curChar == '~');
      }
      builder.type = Type.INCLUDES;
      builder.append("~=");
      reader.next();
      if (debug)
      {
        checkState(reader.curChar == '=');
      }
    }
docs: INCLUDES ~=