code: def dont_cache():
      
      def decorate_func(func):
          @wraps(func)
          def decorate_func_call(*a, **kw):
              callback = SetCacheControlHeadersForNoCachingCallback()
              registry_provider = AfterThisRequestCallbackRegistryProvider()
              registry = registry_provider.provide()
              registry.add(callback)
              return func(*a, **kw)
          return decorate_func_call
      return decorate_func
docs: Set Cache-Control headers for no caching
  
      Will generate proxy-revalidate, no-cache, no-store, must-revalidate,
      max-age=0.