alse if a label value is not the same for all slots within the level, or
if any of those values do not match the matchValue. Returns true otherwise.
Description
Returns whether a label value is the same for all slots within a level.
The specified label value is checked for each slot of the level.
If all label values do not match, then this method returns false. If a matchValue
is provided, all label values must match the matchValue, or this function
will still return false.
Do no remove, this fixes the anchor on doc.flexsim.com