code: public static MozuUrl deleteExtendedPropertyUrl(String key)
  	{
  		UrlFormatter formatter = new UrlFormatter("/api/commerce/carts/current/extendedproperties/{key}");
  		formatter.formatUrl("key", key);
  		return new MozuUrl(formatter.getResourceUrl(), MozuUrl.UrlLocation.TENANT_POD) ;
  	}
docs: Get Resource Url for DeleteExtendedProperty
  @param key
  @return   String Resource Url