{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"///"}]}
    /// one. See `TransitiveRelation::postdom_upper_bound` for details.
    /// (*) If there are multiple competing choices, we pick the "postdominating"
    pub(crate) fn non_local_lower_bound(&self, fr: RegionVid) -> Option<RegionVid> {