import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.opendaylight.yangtools.concepts.Immutable;
import org.opendaylight.yangtools.util.MapAdaptor;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.opendaylight.yangtools.concepts.Immutable;
import org.opendaylight.yangtools.util.MapAdaptor;