in dom/src/main/java/org/apache/james/mime4j/dom/address/Mailbox.java [56:65]
public Mailbox(String name, DomainList route, String localPart,
String domain) {
if (localPart == null)
throw new IllegalArgumentException();
this.name = name == null || name.length() == 0 ? null : name;
this.route = route == null ? EMPTY_ROUTE_LIST : route;
this.localPart = localPart;
this.domain = domain == null || domain.length() == 0 ? null : domain;
}