in typescript/src/pubsub/apple-common.ts [290:301]
function parseBinaryStatus(status: unknown): Result<string, binaryStatus> {
if (typeof status !== 'string') {
return err('Binary Status is not a string');
}
switch (status) {
case '0':
case '1':
return ok(status);
default:
return err('Not a valid status');
}
}