std::pmr::polymorphic_allocator<T>::deallocate
Min standard notice:
Deallocates the storage pointed to by p, which must have been allocated from a std::pmr::memory_resource x that compares equal to *resource() using x.allocate(n * sizeof(T), alignof(T)).
# Declarations
void deallocate( T* p, std::size_t n );
(since C++17)
# Parameters
p: pointer to memory to deallocaten: the number of objects originally allocated