Function extern_spec_T_A_Vec_T_A_into_boxed_slice 

pub fn extern_spec_T_A_Vec_T_A_into_boxed_slice<T, A: Allocator>(
    self_: Vec<T, A>,
) -> Box<[T], A>

extern spec for Vec<T, A>::into_boxed_slice

This is not a real function: its only use is for documentation.

terminates

ghost

ensures

result@ == self@