Function extern_spec_T_Option_T_is_some_and 

pub fn extern_spec_T_Option_T_is_some_and<T>(
    self_: Option<T>,
    f: impl FnOnce(T) -> bool + Destruct,
) -> bool

extern spec for Option<T>::is_some_and

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

requires

self

ensures

self