{"ast_node_type":"import","tokens":[{"end":72,"kind":"keyword","start":0,"text":"//"}]}
        // Cannot be a closure because it is generic in `Prov`, `Extra`.
    fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        fn write_allocation_track_relocs<'tcx, Prov: Provenance, Extra, Bytes: AllocBytes>(