// HTTP protocol doesn't support raw TCP requests.
					return !p.IsTCP()
				},
				targetSupported: func(echo.Target) bool {
					return true
				},
				check: checkHTTP,
			},
			&providerImpl{
				name: grpcName,
				api:  GRPC,
				protocolSupported: func(protocol.Instance) bool {
					return true
				},
				targetSupported: func(echo.Target) bool {