{"ast_node_type":"function","tokens":[{"end":76,"kind":"keyword","start":0,"text":"fn"}]}
    fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &hir::Expr<'_>) {
impl<'tcx> LateLintPass<'tcx> for SpanUseEqCtxt {
        if let hir::ExprKind::Binary(