Revert "[refactor] one method to fetch corpus and list in CodeSection"

This reverts commit b731bf1b.
3 jobs for dev in 24 minutes and 3 seconds (queued for 46 minutes and 23 seconds)
Status Job ID Name Coverage
  Check Lint
passed #17864
check-lint

00:07:29

 
  Compile
passed #17865
compile

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  Test
passed #17866
test

00:07:11