handleDeepLink method
Convenience: parse a deep-link uri for link_click_id and attribute an
open, returning the deep-link data. Not needed with linksEnabled, which
reports opens automatically.
Implementation
Future<Map<String, dynamic>?> handleDeepLink(
Uri uri, {
String type = 'open',
}) {
final clickId = uri.queryParameters['link_click_id'];
if (clickId != null) _seenClicks.add(clickId);
return attribute(type: type, clickId: clickId, slug: _shortLinkSlug(uri));
}