*/
	public void updateRowHeights(Collection<? extends Row> rows) {
		List<Column> columns = mModel.getColumns();
		boolean needRevalidate = false;

		for (Row row : rows) {
			int height = row.getHeight();
			int prefHeight = row.getPreferredHeight(columns);
			if (height != prefHeight) {
				row.setHeight(prefHeight);
				needRevalidate = true;
			}
		}
		if (needRevalidate) {
			contentSizeMayHaveChanged();
			revalidateView();
		}
	}