feat: add some assertion and comment

[thofma]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.02%. Comparing base (39fc9cb) to head (5fe3d49).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/AlgAssAbsOrd/PIP/unit_group_generators.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1679      +/-   ##
==========================================
+ Coverage   75.97%   76.02%   +0.04%     
==========================================
  Files         361      361              
  Lines      113876   113878       +2     
==========================================
+ Hits        86518    86576      +58     
+ Misses      27358    27302      -56     

Files with missing lines	Coverage Δ
src/AlgAssAbsOrd/PIP/unit_group_generators.jl	57.30% <0.00%> (-0.33%)	⬇️

... and 27 files with indirect coverage changes