import static java.util.Objects.requireNonNull;
-import edu.umd.cs.findbugs.annotations.Nullable;
import java.util.Set;
+import org.eclipse.jdt.annotation.Nullable;
import org.opendaylight.lispflowmapping.lisp.type.MappingData;
import org.opendaylight.lispflowmapping.lisp.util.LispAddressStringifier;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.SiteId;