import java.util.ArrayList;
import java.util.List;

/**
 * Represents a witness notification received from the witness service.
 * Contains event information, resource details, and IP address changes.
 */
public class WitnessNotification {
    private WitnessEventType eventType;
    private long timestamp;
    private String resourceName;
    private final List<WitnessIPAddress> newIPAddresses;
    private final List<WitnessIPAddress> oldIPAddresses;

        WitnessNotification.WitnessIPAddress addr4 = new WitnessNotification.WitnessIPAddress(ipv4);
        WitnessNotification.WitnessIPAddress addr6 = new WitnessNotification.WitnessIPAddress(ipv6);

        // IPv4 tests
        assertTrue(addr4.isIPv4());
        assertFalse(addr4.isIPv6());
        assertEquals(WitnessNotification.WitnessIPAddress.IPV4, addr4.getFlags());