def included(base)
      my_injector = injector
      injector_holder = Module.new do
        define_method :__dio_injector__ do
          my_injector
        end
      end
      base.extend(ClassMethods, injector_holder)
      base.include(InstanceMethods)
    end
def included(base)
      my_injector = injector
      injector_holder = Module.new do
        define_method :__dio_injector__ do
          my_injector
        end
      end
      base.extend(ClassMethods, injector_holder)
      base.include(InstanceMethods)
    end
Add some methods to a class which includes Dio module.