TreeItem not expanding on ensureSelectedItemVisible()

I have a tree like following:

Tree
  - Root-1
     + Child-1 (with a composite widget. On clicking +, the widget is shown that has a bunch of labels, textbox etc)
  + Root-2
  + Root-3

Child-1 is added like:
Widget child-1;
root-1.addItem(child-1);
Child-1 is a composite widget containing bunch of labels, textboxes etc. On clicking '+' icon corresponding to Child-1, the widget is made visible.

In code, I have following for making the child tree item visible:
  tree.setSelectedItem(childItem);
  tree.ensureSelectedItemVisible();

Lets say the above code is called for Child-1.
Now first time when the code is called, Root-1 and Child-1 both are expanding and Child-1 is brought in view. Everything is good.

But now if I manually close the Child-1 (clicking on '-' icon) and again run through the same code, Child-1 is brought into focus but not expanded.

Even if I add something like:
child-1.setState(true)
it does not expand Child-1.

Running through GWT's code shows me that setState() only expands the tree item if the item has children but there is no check for widget being set on the tree item.

Is there any workaround for this problem or does this sound like a feature request?

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