code: func (s *Sanitizer) DeleteRange(ctx context.Context, startKey []byte, endKey []byte) error {
  	if !isKeySafe(startKey) {
  		return trace.BadParameter(errorMessage)
  	}
  	if !isKeySafe(endKey) {
  		return trace.BadParameter(errorMessage)
  	}
  	return s.backend.DeleteRange(ctx, startKey, endKey)
  }
docs: // DeleteRange deletes range of items