code: function () {
        for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }
  
        return _emberMetalGet_properties.default.apply(null, [this].concat(args));
      }
docs: To get the values of multiple properties at once, call `getProperties`
  with a list of strings or an array:
  ```javascript
  record.getProperties('firstName', 'lastName', 'zipCode');
  { firstName: 'John', lastName: 'Doe', zipCode: '10011' }
  ```
  is equivalent to:
  ```javascript
  record.getProperties(['firstName', 'lastName', 'zipCode']);
  { firstName: 'John', lastName: 'Doe', zipCode: '10011' }
  ```
  @method getProperties
  @param {String...|Array} list of keys to get
  @return {Object}
  @public