public Builder rpcExt(final String rpcExt) {
            this.rpcExt = rpcExt;
            return this;
        }
rpc extends.
@param rpcExt rpcExt
@return Builder
shenyu-e2e/shenyu-e2e-common/src/main/java/org/apache/shenyu/e2e/model/response/MetaDataDTO.java