optionalTypeArgs top-level constant Null safety
Used to annotate a class, mixin, extension, function, method, or typedef
C. Indicates that any type arguments declared on
C are to
be treated as optional.
Tools such as the analyzer and linter can use this information to suppress
warnings that would otherwise require type arguments on
C to be provided.
const _OptionalTypeArgs optionalTypeArgs = _OptionalTypeArgs();