public static DynamicMessage buildJsonMessage(final String jsonParam) {
        // build Descriptor and set request param
        Descriptors.Descriptor jsonDescriptor = buildJsonMarshallerDescriptor();
        DynamicMessage.Builder jsonDynamicMessage = DynamicMessage.newBuilder(jsonDescriptor);
        jsonDynamicMessage.setField(jsonDescriptor.findFieldByName(GrpcConstants.JSON_DESCRIPTOR_PROTO_FIELD_NAME), jsonParam);
        return jsonDynamicMessage.build();
    }
buildJsonMessage.

@param jsonParam jsonParam
@return DynamicMessage
shenyu-protocol/shenyu-protocol-grpc/src/main/java/org/apache/shenyu/protocol/grpc/message/JsonMessage.java