cachedFn = function cachedFn(name, hashOrId, opts) {
  var cached = this._completedQueries[name][hashOrId];

  if (utils.isFunction(cached)) {
    return cached(name, hashOrId, opts);
  }

  return cached;
}
Wrapper for {@link Collection#unsaved}.

@method SimpleStore#unsaved
@returns {Array} See {@link Collection#unsaved}.
@see Collection#unsaved
@see Collection#unsaved
@since 3.0.0