{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"FixProxyFutureDropVisitor"}]}
    FixProxyFutureDropVisitor { tcx, replace_to: cor_ref_local }.visit_body(&mut body);
    // Now changing first arg from Pin<&mut ImplCoroutine> to Pin<&mut ProxyCoroutine>