code: function Item(item, options) {
    Base.call(this, options);
    this.define('collection', this.options.collection);
  
    if (typeof item === 'object') {
      this.visit('set', item);
    }
  }
docs: Create an instance of `Item` with the specified `options`.
  The `Item` constructor inherits from Base.
  
  ```js
  var item = new Item();
  ```
  @param {Object} `options`
  @return {undefined}
  @api public