{"ast_node_type":"function","tokens":[{"end":74,"kind":"keyword","start":0,"text":"fn"}]}
    fn lower_pat_slice(&mut self, pats: &[P<Pat>]) -> hir::PatKind<'hir> {
    /// Patterns that follow, which are not like `slice` -- or an error occurs, are in `after`.
        let mut before = Vec::new();