Description
If a custom filter is used with JsonSerializer where we need to emit the hidden properties but not hidden node like below then it also emits ":childNodeCount".
"{\"nodes\":[\"*\", \"-:*\"]}"
By default ":childNodeCount" is excluded in default filter hence not being added currently. This looks a left over of initial KernalNodeStore support which supported such properties but which are not used any more. So this should be removed
"{\"properties\":[\"*\", \"-:childNodeCount\"]}"