private void maybeForceBuilderInitialization() {
            if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
            }
        }
Protobuf type {@code com.alipay.sofa.rpc.protobuf.EchoRequest}
example/src/test/java/com/alipay/sofa/rpc/protobuf/EchoRequest.java