valueOf method
Returns the enum value from this iterable that matches the given string value.
The comparison is case-insensitive. Returns null if no match is found.
This is commonly used with MyEnum.values.
{@tool snippet}
enum Status { pending, active, done }
void main() {
  // Successful lookup (case-insensitive)
  final status = Status.values.valueOf('ACTIVE');
  print(status); // Prints: Status.active
  // Failed lookup
  final unknown = Status.values.valueOf('archived');
  print(unknown); // Prints: null
}
{@end-tool}
Implementation
@pragma('vm:prefer-inline')
T? valueOf(String? value) {
  return firstWhereOrNull(
    (type) => type.name.toLowerCase() == value?.toLowerCase().trim(),
  );
}