public TreeRow overRow(int y) {
		if (y < 0) {
			return null;
		}
		int dividerHeight = getRowDividerHeight();
		for (TreeRow row : new TreeRowViewIterator(this, mRoot.getChildren())) {
			y -= getRowHeight(row) + dividerHeight;
			if (y < 0) {
				return row;
			}
		}
		return null;
	}