# File lib/tour/facets/module/cattr.rb, line 189
  def mattr_writer(*syms)
    syms.flatten.each do |sym|
      module_eval("unless defined? @@\#{sym}\n@@\#{sym} = nil\nend\n\ndef self.\#{sym}=(obj)\n@@\#{sym} = obj\nend\n\ndef \#{sym}=(obj)\n@@\#{sym}=(obj)\nend\n", __FILE__, __LINE__)
    end
    return syms
  end