{"ast_node_type":"import","tokens":[{"end":27,"kind":"keyword","start":0,"text":"use"}]}
    use rustc_hir::Node::*;
fn fn_sig(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<'_, ty::PolyFnSig<'_>> {
    use rustc_hir::*;