util: define class paths only once

[jan-janssen]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.78%. Comparing base (ae94217) to head (72d8258).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1908      +/-   ##
==========================================
+ Coverage   79.75%   79.78%   +0.02%     
==========================================
  Files          79       79              
  Lines       10422    10427       +5     
==========================================
+ Hits         8312     8319       +7     
+ Misses       2110     2108       -2     

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