Drive callers with/without argument (model::drive function, etc.)
The model::drive function requires two arguments: the label of the drive caller, and the value. However, some drive callers do not use the value. Passing it should either be optional (Time would be used, if required), or drive callers should be able to tell whether they can honor the value argument. An example is attached variabledrive
Edited by Pierangelo Masarati