3#include <userver/compiler/select.hpp> 
    4#include <userver/utils/fast_pimpl.hpp> 
    8namespace engine::impl {
 
   13using FastPimplWaitList = utils::FastPimpl<WaitList, 88, 
alignof(
void*)>;
 
   16using FastPimplWaitListLight = utils::FastPimpl<WaitListLight, 16, 16>;
 
   19using FastPimplGenericWaitList = utils::FastPimpl<GenericWaitList, 112, 16>;