{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"DerefSource::ImmRef"}]}
                DerefSource::ImmRef => Ty::new_imm_ref(tcx, tcx.lifetimes.re_erased, fnty),
            Adjustment::Deref { source } => match source {
                DerefSource::MutRef => Ty::new_mut_ref(tcx, tcx.lifetimes.re_erased, fnty),