class Kramdown::Parser::Kramdown

def handle_extension(name, opts, body, type, line_no = nil)
  case name
  when 'comment'
    if body.kind_of?(String)
      @tree.children << Element.new(:comment, body, nil, category: type, location: line_no)
    end
    true
  when 'nomarkdown'
    if body.kind_of?(String)
      @tree.children << Element.new(:raw, body, nil, category: type,
                                    location: line_no, type: opts['type'].to_s.split(/\s+/))
    end
    true
  when 'options'
    opts.select do |k, v|
      k = k.to_sym
      if Kramdown::Options.defined?(k)
        if @options[:forbidden_inline_options].include?(k) ||
            k == :forbidden_inline_options
          warning("Option #{k} may not be set inline")
          next false
        end
        begin
          val = Kramdown::Options.parse(k, v)
          @options[k] = val
          (@root.options[:options] ||= {})[k] = val
        rescue StandardError
        end
        false
      else
        true
      end
    end.each do |k, _v|
      warning("Unknown kramdown option '#{k}'")
    end
    @tree.children << new_block_el(:eob, :extension) if type == :block
    true
  else
    false
  end
end