Details of order package.

namestringtrueName of package created in our system (see Create Package], or pass the value custom.
descriptionstringfalseA brief description about the package contents.
sizeDimensionconditionalheight, width, length (in inches). If pre-configured package name is used, size is not required.(see Create Package).
weightdecimalconditionalWeight of the package in pounds (lbs). If pre-configured package name is used, weight is not required. (see Create Package).
quantityintegertrueNumber of packages.
itemsintegerconditionalNumber of items in a single package. Default is 1.
itemListItem - OrderconditionalArray of items in the package. In the absence of size, cubic dimensions and weight will be derived from this list.