code: func (r Billing_Item_Cancellation_Request) RemoveCancellationItem(itemId *int) (resp bool, err error) {
  	params := []interface{}{
  		itemId,
  	}
  	err = r.Session.DoRequest("SoftLayer_Billing_Item_Cancellation_Request", "removeCancellationItem", params, &r.Options, &resp)
  	return
  }
docs: // This method removes a cancellation item from a cancellation request that is in "Pending" or "Approved" status.