# File rexml/child.rb, line 107
    def Child.once(*ids)
      for id in ids
	module_eval "\talias_method :__\#{id.to_i}__, \#{id.inspect}\n\t  def \#{id.id2name}(*args, &block)\n\t    def self.\#{id.id2name}(*args, &block)\n\t\t@__\#{id.to_i}__\n\t    end\n\t    @__\#{id.to_i}__ = __\#{id.to_i}__(*args, &block)\n\t  end\n"
	end
      end