callExtension method
Calls a platform-specific extension method. The available
namespaces and methods are documented per platform in
docs/extensions/<platform>.md. Returns null when the extension
has no structured response.
Implementation
@override
Future<Map<String, Object?>?> callExtension({
required String namespace,
required String method,
Map<String, Object?>? args,
}) async {
callExtensionCalls += 1;
return _extensionResult;
}