code: function getSymNames(data, memo) {
      memo = memo || [];
      data.forEach(function (symbol) {
          // const longName = jsdocx.utils.getFullName(symbol);
          memo.push(symbol.$longname);
          if (!symbol.isEnum && symbol.$members) {
              memo = getSymNames(symbol.$members, memo);
          }
      });
      return memo;
  }
docs: Used within utils.getSymbolNames()