{"ast_node_type":"other","tokens":[{"end":21,"kind":"keyword","start":0,"text":"match"}]}
        match *self {
    pub fn unwrap_vtable(&self) -> (Ty<'tcx>, Option<ty::PolyExistentialTraitRef<'tcx>>) {
            GlobalAlloc::VTable(ty, dyn_ty) => (ty, dyn_ty.principal()),