Is there a way to get # children for implicit shared nodes as zero?

Summary:

I want to have an extract where # Children count to be zero for implicit shared nodes. I tried to create a property where for shared nodes ,the value would be zero and for others, it will refer to corestats.#children, but it is not letting me refer to corestats.#chidren in the expression.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):