docs: @Override
  	public boolean addAll(Collection<? extends T> collection) {
  		boolean changed = false;
  		for (T data : collection) {
  			try {
  				if (addElement(data)) {
  					changed = true;
  				}
  			} catch (SQLException e) {
  				throw new IllegalStateException("Could not create data elements in dao", e);
  			}
  		}
  		return changed;
  	}