class ActionView::RenderParser::RipperASTParser::Node

def to_symbol
  if type == :@label && self[0] =~ /\A(.+):\z/
    $1.to_sym
  elsif type == :symbol_literal && self[0].type == :symbol && self[0][0].type == :@ident
    self[0][0][0].to_sym
  else
    raise "not a symbol?: #{self.inspect}"
  end
end