libaccess-modifier-checker-java - 1.21-1 main

This maven plugin allows applications to define custom
access modifiers programmatically, to be enforced at
compile time in the opt-in basis. Obviously, there's no
runtime check either --- this is strictly a voluntary
annotation.
.
This mechanism is useful for actually making sure that
deprecated features are not used (without actually removing
such declarations, which would break binary compatibility.)