The prop listIndex is marked as required in CustomThemeNodeContentRenderer

[svenkle]

When I use the provided examples in combination with this theme I receive the errors in the console (see screenshot). The controls appear to work correctly although I'm not 100% sure there isn't an unforeseen issue.

In any case, adding listIndex and lowerSiblingCounts to the declaration appears to have resolved the errors but I'm still raising this as an issue to allow others to find a potential solution and also validation that I haven't unknowingly broken internal functionality.

<SortableTree
    // Removed other elements for clarity
    listIndex: 0,
    lowerSiblingCounts: []
/>

[jcalebj]

@svenkle I think that the syntax might be a little off on the SortableTree part, for anyone else that might be running into this problem.

<SortableTree
  generateNodeProps = {() => ({
    listIndex: 0,
    lowerSiblingCounts: []
  })}
/>

[darewreck54]

What are these property used for and what do we configure it to. I'm guessing listIndex is the same as treeIndex but do these properties need to be set properly?