public void handleCommand(final Namespace ns, final Manager m, final OutputWriter outputWriter) {
var contacts = m.getContacts();
- if (outputWriter instanceof PlainTextWriter) {
- final var writer = (PlainTextWriter) outputWriter;
+ if (outputWriter instanceof PlainTextWriter writer) {
for (var c : contacts) {
final var contact = c.second();
writer.println("Number: {} Name: {} Blocked: {} Message expiration: {}",