What are the numbers that seen next to the ios sdk release notes ?

https://developer.apple.com/documentation/ios-ipados-release-notes/ios-ipados-17_4-release-notes At the end of each release note there is a number, eg 121566625). What are these numbers?

My guess: that's probably an internal reference (sequential number or some type of internal coding convention ?). I guess that for each modification of code they attribute a reference number to allow proper tracking.

You have also in some cases the FB that is corrected.

What are the numbers that seen next to the ios sdk release notes ?
 
 
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