Add tracking issue for GSP-654 & Add comments for List

[JinnyYi]

ref: #654

[codecov]

Codecov Report

Merging #658 (5c704a9) into master (f57c90f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #658   +/-   ##
=======================================
  Coverage   17.57%   17.57%           
=======================================
  Files          19       19           
  Lines         768      768           
=======================================
  Hits          135      135           
  Misses        626      626           
  Partials        7        7           

Flag	Coverage Δ
unittests	17.57% <ø> (ø)

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Impacted Files	Coverage Δ
types/operation.generated.go	0.00% <ø> (ø)

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