It's convenient for depending on sub-tree members of the current file as
well as gives access to siblings.
Change-Id: I74234cec6566177d88d3bc8507fa3f6ec789adb8
Reviewed-on: https://cl.snix.dev/c/snix/+/30098
Reviewed-by: adis bladis <adisbladis@gmail.com>
Tested-by: besadii
