{"ast_node_type":"function","tokens":[{"end":92,"kind":"keyword","start":0,"text":"pub(crate)"}]}
    pub(crate) fn choice_regions(&self, pci: NllMemberConstraintIndex) -> &[ty::RegionVid] {
    /// ```
        let MemberConstraint { start_index, end_index, .. } = &self.constraints[pci];