FinalPricer is final: true
mock(FinalPricer.class).price(3) = 999 (real code would give 30)
mock.getClass() == FinalPricer.class : true
default MockMaker : org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker
class-file major version of org.mockito.Mockito : 55 (Java 11)