{"ast_node_type":"function","tokens":[{"end":89,"kind":"keyword","start":0,"text":"pub(crate)"}]}
    pub(crate) fn new(tcx: TyCtxt<'tcx>, free_regions: &'a FreeRegionMap<'tcx>) -> Self {
impl<'a, 'tcx> RegionRelations<'a, 'tcx> {
        Self { tcx, free_regions }