{"ast_node_type":"function","tokens":[{"end":52,"kind":"keyword","start":0,"text":"fn"}]}
    fn new(tcx: TyCtxt<'tcx>, delegate: D) -> Self {
impl<'tcx, D: BoundVarReplacerDelegate<'tcx>> BoundVarReplacer<'tcx, D> {
        BoundVarReplacer { tcx, current_index: ty::INNERMOST, delegate, cache: Default::default() }