class ActionView::RenderParser::RipperRenderParser::Node

def to_string
  raise unless string?
  # s(:string_literal, s(:string_content, map))
  self[0].map do |node|
    case node.type
    when :@tstring_content
      node[0]
    when :string_embexpr
      "*"
    end
  end.join("")
end