I have a heading in my orgmode file. It is automatically updated periodically with new children. I want the heading line to show the number of children.

So if I have one child it would say something like (1)

* Heading (1)
** Subheading

After it gets updated with another subheading the number should automatically be changed to (2)

* Heading (2)
** Subheading
** A new added subheading

I want it to do this because the toplevel heading will normally be collapsed. I want to be able to see if any new children were added to it without having to expand it

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