Function extern_spec_usize_is_multiple_of 

pub fn extern_spec_usize_is_multiple_of(self_: usize, rhs: usize) -> bool

extern spec for usize::is_multiple_of

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

terminates

ghost

ensures

if self == $zero { result == (self == $zero) } else { result == (self@ % rhs@ == 0) }