feat: add guard variants for mock_stat and mock_all_from_stat#103

Koan-Bot wants to merge 1 commit intocpan-authors:maincpan-authors/Overload-FileCheck:mainfrom

Koan-Bot:koan.atoomic/feat-guard-variantsKoan-Bot/Overload-FileCheck:koan.atoomic/feat-guard-variantsCopy head branch name to clipboard