code: function restObject(size, object, keys) {
    let index = keys.length - size - 1,
        newObject = {},
        key;
  
    while (++index < keys.length) {
      key = keys[index];
  
      newObject[key] = object[key];
    }
  
    return newObject;
  }
docs: @function restObject
  
  @description
  get the last n number of items in an object
  
  @param {number} size the number of items to get from the end of the object
  @param {Object} object the object of items to get the last n items from
  @param {Array<string>} keys the object's keys
  @return {Object} the last n number of items in the object