{"ast_node_type":"variable","tokens":[{"end":33,"kind":"keyword","start":0,"text":"let"}]}
    let instance = match symbol {
) -> (CanonAbi, &'tcx [rustc_target::callconv::ArgAbi<'tcx, Ty<'tcx>>]) {
        ExportedSymbol::NonGeneric(def_id) | ExportedSymbol::Generic(def_id, _)