class Kramdown::JekyllDocument

+Kramdown::Document#method_missing+ from kramdown-2.1.0.
The implementation is basically an optimized version of core logic in

Use Kramdown::Converter::Html class to convert this document into HTML.

def to_html
  output, warnings = Kramdown::Converter::Html.convert(@root, @options)
  @warnings.concat(warnings)
  output
end