code: @Override
  	public int deleteIds(Collection<FeatureTileLinkKey> idCollection)
  			throws SQLException {
  		int count = 0;
  		if (idCollection != null) {
  			for (FeatureTileLinkKey id : idCollection) {
  				count += deleteById(id);
  			}
  		}
  		return count;
  	}
docs: {@inheritDoc}