Detecting UITableViewAccessory in UI Automation Testing

I have written a simple ToDo list in order to learn UI Automation but am having difficulty detecting checkmarks in my TableViewCells.

UIALogger.logMessage("adding a checkmark");

// get reference to a cell
var cell = tableView.cells()["Butter"];

// tap the cell (adds a checkmark)
cell.tap();

// make sure this is completed...
target.delay(2);

// view the child nodes
cell.logElementTree();

All I can see in the tree is a UIAStaticText, no reference to the accessoryType at all! How can I see if this is set to Checkmark?