Fixed an issue with mapped property symbol not displaying added | undefined when its origin symbol was optional - #59957

Fixed an issue with mapped property symbol not displaying added | undefined when its origin symbol was optional#59957

Mateusz Burzyński (Andarist) wants to merge 12 commits into

microsoft:mainmicrosoft/TypeScript:mainfrom

Andarist:fix/mapped-prop-undefined-displayAndarist/TypeScript:fix/mapped-prop-undefined-displayCopy head branch name to clipboard