The default is to load all its children just to check whether it's a leaf.
This slows down Project View loading for no good reason,
especially if the node is never expanded.
The only downside of a never-leaf node is that it'll always show
an expand control, even if there are no actual children.
Which is a very small trade-off that only affects very exotic cases.
GitOrigin-RevId: 39a0924475dc5e63f02f8ab548601b66e115deeb
