Function extern_spec_ShrAssign__ref_u128_u64_shr_assign 

pub fn extern_spec_ShrAssign__ref_u128_u64_shr_assign(
    self_: &mut u64,
    rhs: &u128,
)

extern spec for u64::shr_assign

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

requires

(0usize as $rhs) <= *rhs && *rhs < $type::BITS as $rhs

ensures

^self == *self $op rhs