Isn't there any uiBlock data in the blend file?

Contributing to Blender
1

I’m learning about blend files using my own parser.
The target files are as follows
https://github.com/blender/blender/blob/main/release/datafiles/startup.blend

First, I found the “GLOB” identifier and traced the member variables from there.
(A[B]: Let A be the structure name and B be the member variable name.)
FileGlobal[curscreen]
bScreen[areabase]
ListBase[first]
ScrArea[regionbase]
ListBase[first]
ARegion[uiblocks]
ListBase[first] ← Corresponding memory address not found.
This address was 00007FA83EFB1218.
am I doing something wrong?
If I’m correct, where is the uiBlock defined?

2

There is no uiBlock in .blend files, these only exist at runtime. Blender will set these pointers to null on .blend file load.

3

Thank you for your quick reply.
I’m relieved that I’m not wrong. (for now)
Then, where should I look in C/C++ source code?
Or Is this loading another file?

4

The code that clears the list on file-load is in direct_link_region in screen.cc: BLI_listbase_clear(&region->uiblocks);.