def sanitize_for_mass_assignment_with_or_without_role(new_attributes, options)
      if method(:sanitize_for_mass_assignment).arity.abs > 1
        sanitize_for_mass_assignment new_attributes, options[:as] || :default
      else
        sanitize_for_mass_assignment new_attributes
      end
    end
def sanitize_for_mass_assignment_with_or_without_role(new_attributes, options)
      if method(:sanitize_for_mass_assignment).arity.abs > 1
        sanitize_for_mass_assignment new_attributes, options[:as] || :default
      else
        sanitize_for_mass_assignment new_attributes
      end
    end
Rails 3.0 and 4.0 do not take a role argument for the sanitizer
 @since 0.7.0