UHeading.fromMap constructor
Reads it from the native map.
Implementation
factory UHeading.fromMap(Map<Object?, Object?> m) => UHeading(
magnetic: (m["magnetic"]! as num).toDouble(),
trueNorth: (m["true"] as num?)?.toDouble(),
accuracy: (m["accuracy"] as num?)?.toDouble(),
time: DateTime.fromMillisecondsSinceEpoch((m["time"] as num?)?.toInt() ?? DateTime.now().millisecondsSinceEpoch),
);