class Treetop::Runtime::SyntaxNode

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