code: func (r Product_Package) GetItemsFromImageTemplate(imageTemplate *datatypes.Virtual_Guest_Block_Device_Template_Group) (resp []datatypes.Product_Item, err error) {
  	params := []interface{}{
  		imageTemplate,
  	}
  	err = r.Session.DoRequest("SoftLayer_Product_Package", "getItemsFromImageTemplate", params, &r.Options, &resp)
  	return
  }
docs: // Return a collection of [[SoftLayer_Product_Item]] objects from a [[SoftLayer_Virtual_Guest_Block_Device_Template_Group]] object