{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"pats:"}]}
    pats: SmallVec<[PatOrWild<'p, Cx>; 2]>,
    // Rows of len 1 are very common, which is why `SmallVec[_; 2]` works well.
    /// Sometimes we know that as far as this row is concerned, the current case is already handled