Allows one to store a header struct and a vector all inline in the same memory on the heap and share weak versions for minimizing random lookups in data structures
If you use this without creating a weak ptr, it is safe. It is unsafe to create a weak pointer because you now have aliasing.
std
Enables API's that requires stdlib features. Provides more compatibility toVec. This feature is enabled by default.atomic_append
Enables theatomic_pushAPI's that allows extending aHeaderVecwith interior mutability from a single thread by a immutable handle. This feature is enabled by default.