function isTreeCell(cell)
	{
		var result = false;
		
		if (cell != null)
		{
			graph.traverse(cell, true, function(vertex)
			{
				result = vertex.getAttribute('treeRoot') == '1';
				
				return !result;
			}, null, null, true);
		}
		
		return result;
	}
Mindmaps plugin.

Todo:
- Make cursor key selection more generic
- Handle single-cell movement on touch
- Move multiple cells without subtrees
- Make offset subtrees more generic