logstash-core/lib/logstash/compiler/lscl/lscl_grammar.rb [737:778]:
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      r0.extend(Plugin2)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:plugin][start_index] = r0

    r0
  end

  def _nt_name
    start_index = index
    if node_cache[:name].has_key?(index)
      cached = node_cache[:name][index]
      if cached
        node_cache[:name][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0 = index
    s1, i1 = [], index
    loop do
      if has_terminal?(@regexps[gr = '\A[A-Za-z0-9_-]'] ||= Regexp.new(gr), :regexp, index)
        r2 = true
        @index += 1
      else
        terminal_parse_failure('[A-Za-z0-9_-]')
        r2 = nil
      end
      if r2
        s1 << r2
      else
        break
      end
    end
    if s1.empty?
      @index = i1
      r1 = nil
    else
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logstash-core/lib/logstash/config/grammar.rb [761:802]:
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      r0.extend(Plugin2)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:plugin][start_index] = r0

    r0
  end

  def _nt_name
    start_index = index
    if node_cache[:name].has_key?(index)
      cached = node_cache[:name][index]
      if cached
        node_cache[:name][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0 = index
    s1, i1 = [], index
    loop do
      if has_terminal?(@regexps[gr = '\A[A-Za-z0-9_-]'] ||= Regexp.new(gr), :regexp, index)
        r2 = true
        @index += 1
      else
        terminal_parse_failure('[A-Za-z0-9_-]')
        r2 = nil
      end
      if r2
        s1 << r2
      else
        break
      end
    end
    if s1.empty?
      @index = i1
      r1 = nil
    else
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