Perform a mid-cycle contract upgrade.
Id of the Contract
Upgrade configuration used when WbCustomer is performing a Contract Upgrade for a Customer
Type of plan upgrade:
The main difference between ChangeUnitCount and using NewPlan with the ID of the same plan is that if the prices of features changed between contract creation and current time, ChangeUnitCount will preserve the prices of features recorded in the contract, while using NewPlan will also mean that new prices will take effect.
By default downgrading to a cheaper plan can only be done at the end of the billing cycle
This is done to avoid the need to refund unused part of the current billing cycle
from the old contract
However, WbCustomer may override this behaviour, and force immediate downgrade by
setting this argument to true.
Default is false
Upgraded
The response is of type string.