The Shibboleth IdP V4 software will leave support on September 1, 2024.
NOTPredicate
shibboleth.Conditions.NOT negates/reverses the supplied Predicate.
shibboleth.BiConditions.NOT 4.1 negates/reverses the supplied BiPredicate.
It is an abstract bean so requires a bean as a constructor argument.
Examples can be found here.