// TODO: Richer logging abstractions.
/*
cargo run --example log-around-dealloc --features systematic_testing
a TOP
a Registeded cown at address 0
a Just allocated
a Shared 0 acquire
a Just cloned
a Shared 0 release
a decref_shared 0x7f4a88510020
a dropped v1
a Shared 0 release
a decref_shared 0x7f4a88510020
a decref_shared part 20x7f4a88510020
a Cown 0 dealloc
a Collecting cown 0
a Cown 0 weak release
a Cown 0 no references left.
a dropped v2
*/