code: function transformItem(stream, item) {
      var ret;
      if (isArray(item)) {
          if (isHashArray(item)) {
              ret = transformHashArrayData(stream, item);
          } else {
              ret = transformArrayData(stream, item);
          }
      } else {
          ret = transformHashData(stream, item);
      }
      return ret;
  }
docs: wrapper to determin what transform to run