forceSetCrdtHlc method
Test helper: forcibly sets crdtHlc on a document without going through the full updateDocumentData path. Useful when that method is overridden in a subclass (e.g. _HangingDataSource) to simulate in-flight requests.
Implementation
void forceSetCrdtHlc(String documentId, String hlc) {
final doc = _documents[documentId];
if (doc != null) {
_documents[documentId] = doc.copyWith(crdtHlc: hlc);
}
}