[F] getMadeOptionalOn
function getMadeOptionalOn(p, t): undefined | Version;Parameters
| Parameter | Type | 
|---|---|
| p | Program | 
| t | Type | 
Returns
undefined | Version
version when the given type was made optional if applicable.
function getMadeOptionalOn(p, t): undefined | Version;| Parameter | Type | 
|---|---|
| p | Program | 
| t | Type | 
undefined | Version
version when the given type was made optional if applicable.