{"ast_node_type":"function","tokens":[{"end":65,"kind":"keyword","start":0,"text":"fn"}]}
            fn visit_expr(&mut self, ex: &'tcx hir::Expr<'tcx>) {
        impl<'tcx> Visitor<'tcx> for FindUselessClone<'tcx> {
                if let hir::ExprKind::MethodCall(..) = ex.kind