# File lib/treetop/runtime/syntax_node.rb, line 63
      def inspect_self(indent="")
        em = extension_modules
        interesting_methods = methods-[em.last ? em.last.methods : nil]-self.class.instance_methods
        im = interesting_methods.size > 0 ? " (#{interesting_methods.join(",")})" : ""
        tv = text_value
        tv = "...#{tv[-20..-1]}" if tv.size > 20

        indent +
        self.class.to_s.sub(/.*:/,'') +
          em.map{|m| "+"+m.to_s.sub(/.*:/,'')}*"" +
          " offset=#{interval.first}" +
          ", #{tv.inspect}" +
          im
      end