Fix: Ignore protected methods declared in traits

[localheinz]

This pull request

• ignores protected methods declared in traits

Fixes #838.
Fixes #893.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.39%. Comparing base (e5bd8b5) to head (30998b6).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #894      +/-   ##
============================================
+ Coverage     97.36%   97.39%   +0.02%     
- Complexity      205      209       +4     
============================================
  Files            23       23              
  Lines           722      729       +7     
============================================
+ Hits            703      710       +7     
  Misses           19       19              

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