#[unsafe(no_mangle)]pub const extern "C" fn nstd_vec_allocator<'a>(
vec: &NSTDVec<'a>,
) -> &'a NSTDAllocatorAvailable on crate feature
vec only.#[unsafe(no_mangle)]pub const extern "C" fn nstd_vec_allocator<'a>(
vec: &NSTDVec<'a>,
) -> &'a NSTDAllocatorvec only.