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kotlinlang

I am trying to use `lazyPolulate` for tree view and a bit confused. By default `leafCheck: (LazyTreeItem&lt;T&gt;) -&gt; Boolean = { it.hasChildren() }` which means it should return `true` on nodes and `false` on leaves. The implementation on the contrary expects it to be `false` on nodes. 
I have and object, that can generate its children lazily and also check if there are children. And the same goes for its children. When I write
```
                            lazyPopulate( leafCheck = { it.value.hasChildren }) {
                                it.value.children
                            }
```
I all top level nodes as leafs, but when I flip `it.value.hasChildren`, I get top level nodes as nodes, but second level nodes as leafs. What is wrong?