dynamic role AndrzejKrzywda way?

roles.rb

class Person
  def role(obj)
    obj.role_for = self # if role object needs it 
    @roles << obj
  end

  def unrole(obj)
    @roles.delete(obj)
  end

  def method_missing(method)
    role = @roles.find{|r| r.respond_to?(method) }
    role ? return role.send(method) : super
  end
end