fix column setter, add row get/set

[jkanche]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.27%. Comparing base (54a89ad) to head (8d80dc3).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #104      +/-   ##
==========================================
+ Coverage   73.09%   73.27%   +0.18%     
==========================================
  Files           7        7              
  Lines         851      857       +6     
  Branches      111      111              
==========================================
+ Hits          622      628       +6     
  Misses        178      178              
  Partials       51       51              

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