message: Fix for node 10
diff: @@ -53,7 +53,7 @@ Connection.prototype.register = function(name, return_type, fun) {
  case 'STRUCT<?>': {
  const tmp = {};
  const children = [];
  - for (let j = 0; j < (arg.children?.length || 0); ++j) {
  + for (let j = 0; j < (arg.children.length || 0); ++j) {
  const attr = arg.children[j];
  const child = buildResolver(attr);
  children.push((row) => {
  