pkg/front_end/parser_testcases/record/record_type_as_optional_parameter.dart

void foo([(int, int) foo1, (int, int) foo2]) {
}
void bar([(int, int) foo1 = (42, 42), (int, int) foo2 = (42, 42)]) {
}
void baz([(int, int)? foo1, (int, int)? foo2]) {
}