this.reason = reason;
            return this;
        }
    }

    private static class CapabilityAction {
        private final Spec<? super Capability> predicate;
        private final Action<? super CapabilityResolutionDetails> action;

        private CapabilityAction(Spec<? super Capability> predicate, Action<? super CapabilityResolutionDetails> action) {
            this.predicate = predicate;