code: function _isValuePair(el) {
    if (_.isObject(el) && _.size(el) === 2) {
      var keys = _.keys(el);
      if (new RegExp(/^@/).test(keys[0]) && keys[1] === '__value__') {
        return true;
      }
    }
    return false;
  }
docs: /*
  helper: identify a structure returned from the API:
  { @key:KEY, __value__:VALUE } => want to turn into { KEY: VALUE }
  (and array of these into single obj)