cloud_firestore] 0.14.0 Crash when StreamBuilder cancels subscription ( NullPointerException Attempt to invoke ListenerRegistration.remove() on a null object reference / Invalid argument: Instance of 'DocumentReference' ) · Issue #3237 · firebase ...
type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast · Issue #351 · google/json_serializable. dart · GitHub
Mastering Dart by Sergey Akopkokhyants - Ebook | Scribd
Can't convert LinkedHashMap<dynamic,dynamic> to HashMap<String,List<String>> in dart or flutter · Issue #36836 · dart-lang/sdk · GitHub
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Dart/Flutter Map, HashMap Tutorial with Examples - BezKoder