handleGroupUnion method
Implementation
void handleGroupUnion(MethodCall call) {
Map<Object?, Object?> args = call.arguments as Map<Object?, Object?>;
String groupKey = args['groupKey'] as String;
dynamic groupID = args['groupID'];
String name = args['name'] as String;
dynamic value = args['value'] as dynamic;
get_group(groupKey,
(groupID is Map || groupID is List) ? js.jsify(groupID) : groupID)
.union(name, js.jsify(value));
}