Fix iterator type so that it matches boundary condition type

[ericstj]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 68.65%. Comparing base (72cfdf6) to head (725535d). Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7150      +/-   ##
==========================================
+ Coverage   68.55%   68.65%   +0.10%     
==========================================
  Files        1259     1262       +3     
  Lines      255844   257730    +1886     
  Branches    26434    26658     +224     
==========================================
+ Hits       175392   176945    +1553     
- Misses      73717    73971     +254     
- Partials     6735     6814      +79     

Flag	Coverage Δ
Debug	68.65% <ø> (+0.10%)	:arrow_up:
production	62.94% <ø> (+0.03%)	:arrow_up:
test	88.85% <ø> (+0.15%)	:arrow_up:

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see 28 files with indirect coverage changes