[channels_integration_test_ios] [STDOUT] stdout: [        ] flutter: The following _CastError was thrown during a platform message response callback:
[channels_integration_test_ios] [STDOUT] stdout: [        ] flutter: type 'Null' is not a subtype of type 'List<dynamic>' in type cast
[channels_integration_test_ios] [STDOUT] stdout: [        ] flutter:
[channels_integration_test_ios] [STDOUT] stdout: [        ] flutter: When the exception was thrown, this was the stack:
[channels_integration_test_ios] [STDOUT] stdout: [        ] flutter: #0      BackgroundIsolateBinaryMessenger.ensureInitialized.<anonymous closure> (package:flutter/src/services/_background_isolate_binary_messenger_io.dart:51:46)
[channels_integration_test_ios] [STDOUT] stdout: [        ] flutter: (elided 7 frames from class _RawReceivePortImpl and dart:async)