anchor.diff:    @override
     Handler get handler => wrapCloudEventFunction(function);
   
  -  const CloudEventFunctionEndPoint(String target, this.function)
  +  const _CloudEventFunctionEndPoint(String target, this.function)
         : super(target);
   }
  
positive.code:   @override
    Handler get handler => function;
  
    const HttpFunctionEndPoint(String target, this.function) : super(target);
  }
  
  class CloudEventFunctionEndPoint extends FunctionEndpoint {
    final CloudEventHandler function;
  
    @override
  
negative.code:   const FunctionEndpoint(this.target);
  
    const factory FunctionEndpoint.http(String target, Handler function) =
        _HttpFunctionEndPoint;
  
    const factory FunctionEndpoint.cloudEvent(
      String target,
      CloudEventHandler function,
    ) = _CloudEventFunctionEndPoint;
  }
  
  class _HttpFunctionEndPoint extends FunctionEndpoint {
    final Handler function;
  
    @override
  