getFactMetaDate method
Implementation
Future<FactSchemaAndDate> getFactMetaDate(MetaDateRef ref) async {
final schema = await loadFactSchema(ref.factRef);
final date =
schema.dates!.firstOrNull((metaDate) => metaDate.path == ref.path);
return FactSchemaAndDate(
schema,
date ??
illegalState<IFactMetaDate>(
"Missing expected fact metadate: $ref"));
}