class ActionView::Helpers::InstanceTag

def content_tag(*args)
  html_tag = content_tag_with_haml(*args)
  return html_tag unless respond_to?(:error_wrapping)
  return error_wrapping(html_tag) if method(:error_wrapping).arity == 1
  return html_tag unless object.respond_to?(:errors) && object.errors.respond_to?(:on)
  return error_wrapping(html_tag, object.errors.on(@method_name))
end

def haml_buffer
  @template_object.send :haml_buffer
end

def is_haml?
  @template_object.send :is_haml?
end