Reorganize _with_from_imports

[DanielNoord]

Before continuing with #2614 let's restructure this a bit by pulling unrelated logic out of the main while loop.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.43%. Comparing base (c7b625f) to head (cdce8df).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2615      +/-   ##
==========================================
- Coverage   99.43%   99.43%   -0.01%     
==========================================
  Files          41       41              
  Lines        3168     3166       -2     
  Branches      686      686              
==========================================
- Hits         3150     3148       -2     
  Misses         11       11              
  Partials        7        7              

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