/*
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)
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;
}