How to check with google/apiclient if a directory with a specified id exists in Google Drive?

Question

I tried:

count($drive->files->listFiles([
    'q' => "mimeType='application/vnd.google-apps.folder' and id='$driveDirId'"
])['files']) > 0

but Drive query language doesn't seem to have an id term

I would only need checking for directories I have access to, of course.

Answer 1

Ended up doing this:

$driveFile = $drive->files->get($driveDirId, [
    'supportsAllDrives' => true,
]);
if ($driveFile === null) {
    return false;
}
if ($driveFile->getMimeType() === 'application/vnd.google-apps.folder') {
    return true;
} else {
    throw new Error("$driveDirId is not a directory");
}