Restricts the value to one of a fixed set of values, given either as an array of strings
or as an object mapping (e.g. a TypeScript const object used as an enum).
allowAll: true (only meaningful combined with multiple: true) accepts the string
'all' as shorthand for every value in the set.
Restricts the value to one of a fixed set of values, given either as an array of strings or as an object mapping (e.g. a TypeScript const object used as an enum).
allowAll: true(only meaningful combined withmultiple: true) accepts the string'all'as shorthand for every value in the set.