sdk-extensions: remove 'Visible for test' comment

[kevinburkesegment]

The function under the comment is invoked from other public classes, and should be indicated as a public function.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.83%. Comparing base (90e030f) to head (893cf28).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #7381   +/-   ##
=========================================
  Coverage     89.83%   89.83%           
  Complexity     6895     6895           
=========================================
  Files           786      786           
  Lines         20793    20793           
  Branches       2026     2026           
=========================================
  Hits          18679    18679           
  Misses         1469     1469           
  Partials        645      645           

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[jack-berg]

The function under the comment is invoked from other public classes, and should be indicated as a public function.

Yes, definitely not used exclusively in tests, but is still package private rather than public.

Thanks!