code: public static MozuUrl updateCartItemQuantityUrl(String cartItemId, Integer quantity, String responseFields)
  	{
  		UrlFormatter formatter = new UrlFormatter("/api/commerce/carts/current/items/{cartItemId}/{quantity}?responseFields={responseFields}");
  		formatter.formatUrl("cartItemId", cartItemId);
  		formatter.formatUrl("quantity", quantity);
  		formatter.formatUrl("responseFields", responseFields);
  		return new MozuUrl(formatter.getResourceUrl(), MozuUrl.UrlLocation.TENANT_POD) ;
  	}
docs: Get Resource Url for UpdateCartItemQuantity
  @param cartItemId Identifier of the cart item to delete.
  @param quantity The number of cart items in the shopper's active cart.
  @param responseFields Filtering syntax appended to an API call to increase or decrease the amount of data returned inside a JSON object. This parameter should only be used to retrieve data. Attempting to update data using this parameter may cause data loss.
  @return   String Resource Url