A function that computes a constraint's value. It's called with the constraint itself (for pauseGetter/resumeGetter) and the getterArg passed to get(), if any.
pauseGetter
resumeGetter
getterArg
get()
Optional
A function that computes a constraint's value. It's called with the constraint itself (for
pauseGetter/resumeGetter) and thegetterArgpassed toget(), if any.