Function extern_spec_std_time_Duration_is_zero 

pub fn extern_spec_std_time_Duration_is_zero(self_: &Duration) -> bool

extern spec for ::std::time::Duration::is_zero

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

terminates

ghost

ensures

self@ == 0 ==> result == true

ensures

self@ != 0 ==> result == false