Deduction guide for creating an absl::Cleanup from a callback.
Declared in <absl/cleanup/cleanup.h>
template<typename Callback>
Cleanup<cleanup_internal::Tag, Callback>(Callback callback) -> Cleanup<cleanup_internal::Tag, Callback>;
C++17 type deduction API for creating an instance of absl::Cleanup, e.g. absl::Cleanup c = /* callback */;.