class Haml::Filters::TiltBase

def self.render(name, source, indent_width: 0)
  text = ::Tilt["t.#{name}"].new { source }.render
  return text if indent_width == 0
  if text.frozen?
    text.gsub(/^/, ' ' * indent_width)
  else
    text.gsub!(/^/, ' ' * indent_width)
  end
end