import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;

public final class MissingBoundAnnotations {
  @SuppressWarnings("nullness:type.argument")
  public static <K extends Comparable<? super K>, V> Collection<K> sortedKeySet(Map<K, V> m) {
    ArrayList<K> theKeys = new ArrayList<>(m.keySet());
    Collections.sort(theKeys);
    return theKeys;
  }
}