{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"if"}]}
        if let GenericParamKind::Lifetime { .. } = param.kind {
    fn check_generic_param(&mut self, cx: &LateContext<'_>, param: &hir::GenericParam<'_>) {
            self.check_snake_case(cx, "lifetime", &param.name.ident());