{"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"self.within_domain(index)"}]}
        self.within_domain(index)
    pub fn contains(&self, index: u32) -> Option<bool> {
            .then(|| ((self.0.checked_shr(index).unwrap_or(T::ONE)) & T::ONE) == T::ONE)