# File lib/aws/xml_grammar.rb, line 726
      def add_mutators(variable_name,
                       setter = nil,
                       getter = nil)
        return if context.kind_of?(Context)
        variable_name = variable_name.to_s.gsub(/\?$/, '')
        setter ||= "#{variable_name}="
        getter ||= variable_name
        return if context.respond_to?(getter) && context.respond_to?(setter)
        MetaUtils.extend_method(context, setter) do |val|
          instance_variable_set("@#{variable_name}", val)
        end
        MetaUtils.extend_method(context, getter) do
          instance_variable_get("@#{variable_name}")
        end
      end