module Cucumber::Core::Ast::DescribesItself

def describe_to(visitor, *args)
  visitor.send(description_for_visitors, self, *args) do |child_visitor|
    children.each do |child|
      begin
        child.describe_to(child_visitor, *args)
      rescue => e
        raise e.class, "Failed describing child of #{self.inspect} - #{e.message}", e.backtrace
      end
    end
  end
  self
end