fix casts

@@ -9,14 +9,16 @@ Size toSize(Map data) {
   return Size(width, height);
 }
 
-List<Offset>? toCorners(List? data) {
-  if (data != null) {
-    return List.unmodifiable(
-      data.map((e) => Offset((e as Map)['x'] as double, e['y'] as double)),
-    );
-  } else {
+List<Offset>? toCorners(List<Map<String, Object?>>? data) {
+  if (data == null) {
     return null;
   }
+
+  return List.unmodifiable(
+    data.map((Map<String, Object?> e) {
+      return Offset(e['x']! as double, e['y']! as double);
+    }),
+  );
 }
 
 BarcodeFormat toFormat(int value) {

@@ -92,7 +92,8 @@ class Barcode {
 
   /// Create a [Barcode] from native data.
   Barcode.fromNative(Map data)
-      : corners = toCorners(data['corners'] as List?),
+      : corners =
+            toCorners((data['corners'] as List?)?.cast<Map<String, Object?>>()),
         format = toFormat(data['format'] as int),
         rawBytes = data['rawBytes'] as Uint8List?,
         rawValue = data['rawValue'] as String?,
@@ -201,18 +202,20 @@ class ContactInfo {
   /// Create a [ContactInfo] from native data.
   ContactInfo.fromNative(Map data)
       : addresses = List.unmodifiable(
-          (data['addresses'] as List).map((e) => Address.fromNative(e as Map)),
+          (data['addresses'] as List? ?? [])
+              .cast<Map>()
+              .map(Address.fromNative),
         ),
         emails = List.unmodifiable(
-          (data['emails'] as List).map((e) => Email.fromNative(e as Map)),
+          (data['emails'] as List? ?? []).cast<Map>().map(Email.fromNative),
         ),
         name = toName(data['name'] as Map?),
         organization = data['organization'] as String?,
         phones = List.unmodifiable(
-          (data['phones'] as List).map((e) => Phone.fromNative(e as Map)),
+          (data['phones'] as List? ?? []).cast<Map>().map(Phone.fromNative),
         ),
         title = data['title'] as String?,
-        urls = List.unmodifiable(data['urls'] as List);
+        urls = List.unmodifiable((data['urls'] as List? ?? []).cast<String>());
 }
 
 /// An address.
@@ -227,7 +230,9 @@ class Address {
 
   /// Create a [Address] from native data.
   Address.fromNative(Map data)
-      : addressLines = List.unmodifiable(data['addressLines'] as List),
+      : addressLines = List.unmodifiable(
+          (data['addressLines'] as List? ?? []).cast<String>(),
+        ),
         type = AddressType.values[data['type'] as int];
 }