Function extern_spec_T_IntoIterator_Option_T_into_iter 

pub fn extern_spec_T_IntoIterator_Option_T_into_iter<T>(
    self_: Option<T>,
) -> IntoIter<T>

extern spec for Option<T>::into_iter

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

terminates

ghost

ensures

self == result@