code: function sync(method, instance, options) {
  	if ( method === 'delete' ) {
  		return deleteItem( instance, options );
  	} else if ( method === 'create' || method === 'update' ) {
  		return putItem( instance, options );
  	} // `method` equals 'read' below this point
  
  	if ( instance instanceof Backbone.DynamoDB.Collection ) {
  		return fetchCollection( instance, options );
  	}
  
  	return getItem( instance, options );
  }
docs: Sync function for all Backbone requests: save, destroy, and fetch.