{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"autodiff::find_autodiff_source_functions(tcx,"}]}
        autodiff::find_autodiff_source_functions(tcx, &usage_map, autodiff_mono_items);
    let autodiff_items =
    let autodiff_items = tcx.arena.alloc_from_iter(autodiff_items);