feat(enhancement): update godoc, method signature, and cleanup unused symbols

[jeevatkm]

• add license text

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.81%. Comparing base (c6b08cf) to head (af7b4a7).
Report is 1 commits behind head on v3.

Additional details and impacted files

@@            Coverage Diff             @@
##               v3     #936      +/-   ##
==========================================
- Coverage   99.81%   99.81%   -0.01%     
==========================================
  Files          17       17              
  Lines        3788     3787       -1     
==========================================
- Hits         3781     3780       -1     
  Misses          5        5              
  Partials        2        2              

Flag	Coverage Δ
unittests	99.81% <100.00%> (-0.01%)	⬇️

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