docs: function deprecatingAlias(dependentKey, options) {
      return _emberMetalComputed.computed(dependentKey, {
        get: function (key) {
          _emberMetalDebug.deprecate('Usage of `' + key + '` is deprecated, use `' + dependentKey + '` instead.', false, options);
          return _emberMetalProperty_get.get(this, dependentKey);
        },
        set: function (key, value) {
          _emberMetalDebug.deprecate('Usage of `' + key + '` is deprecated, use `' + dependentKey + '` instead.', false, options);
          _emberMetalProperty_set.set(this, dependentKey, value);
          return value;
        }
      });
    }