Join the execution until completion. If at least one evaluation wasn't successful, return its error.
Declared in <checkqueue.h>
[[requires_capability(0x7f951199bd78), requires_capability(0x7f9503ee8578), requires_capability(0x7f9526afcdf8), requires_capability(0x7f9524c07798), requires_capability(0x7f94f1580758)]]
std::optional<R>
Complete();The error from the first failed check, or std::nullopt if all passed.