public boolean remove(long key) {
    for (Map<Long, Long> m : buckets) {
      if (m.remove(key) != null) {
        return true;
      }
    }
    return false;
  }
public boolean remove ( long key ) { for ( Map < Long , Long > m : buckets ) { if ( m . remove ( key ) != null ) { return true ; } } return false ; }
from some map. False otherwise.