@Override
    public void close() {
        if (this.keystorePatchWatcherService != null) {
            this.keystorePatchWatcherService.close();
        }
    }
This is {@link JsonWebKeySetStringCipherExecutor}.

@author Misagh Moayyed
@since 5.3.0
core/cas-server-core-util-api/src/main/java/org/apereo/cas/util/cipher/JsonWebKeySetStringCipherExecutor.java