clear method
Resets the Scope to its default state
Implementation
Future<void> clear() async {
clearAttachments();
level = null;
span = null;
_transaction = null;
_fingerprint = [];
_tags.clear();
_extra.clear();
_eventProcessors.clear();
_clearBreadcrumbsSync();
_setUserSync(null);
await clearBreadcrumbs();
await setUser(null);
}