fix: avoid mutating unique byArgs during key mapping

[OdunlamiZO]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.50%. Comparing base (d977f7e) to head (a8a65de).

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #5   +/-   ##
=======================================
  Coverage   87.50%   87.50%           
=======================================
  Files           9        9           
  Lines         200      200           
  Branches       33       33           
=======================================
  Hits          175      175           
  Misses         25       25           

Flag	Coverage Δ
unittests	87.50% <100.00%> (ø)

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