private String buildRpcExt(final ShenyuGrpcClient shenyuGrpcClient,
                               final MethodDescriptor.MethodType methodType) {
        GrpcExt build = GrpcExt.builder()
                .timeout(shenyuGrpcClient.timeout())
                .methodType(methodType)
                .build();
        return GsonUtils.getInstance().toJson(build);
    }
Instantiates a new Shenyu client bean post processor.

@param clientConfig the shenyu grpc client config
@param shenyuClientRegisterRepository the shenyuClientRegisterRepository
shenyu-client/shenyu-client-grpc/src/main/java/org/apache/shenyu/client/grpc/GrpcClientEventListener.java