# File lib/aws/core/xml_grammar.rb, line 757
        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