public MetaDataDOBuilder rpcExt(final String rpcExt) {
            this.rpcExt = rpcExt;
            return this;
        }
rpcExt.

@param rpcExt the rpcExt.
@return MetaDataDOBuilder.
shenyu-admin/src/main/java/org/apache/shenyu/admin/model/entity/MetaDataDO.java