update(splitter): updates for advanced transport packages

[jdlarsen-UA]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 5.88235% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.5%. Comparing base (556c088) to head (5c4cad8).
⚠️ Report is 163 commits behind head on develop.

Files with missing lines	Patch %	Lines
flopy/mf6/utils/model_splitter.py	5.8%	16 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2761      +/-   ##
===========================================
+ Coverage     55.5%    72.5%   +17.0%     
===========================================
  Files          644      677      +33     
  Lines       124135   132648    +8513     
===========================================
+ Hits         68947    96227   +27280     
+ Misses       55188    36421   -18767     

Files with missing lines	Coverage Δ
flopy/mf6/utils/model_splitter.py	65.2% <5.8%> (-9.7%)	⬇️

... and 579 files with indirect coverage changes

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