{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"//"}]}
        // More generally, the expected type wants a tuple variant with one field of an
        // Identify the case `Some(x, y)` where the expected type is e.g. `Option<(T, U)>`.
        // N-arity-tuple, e.g., `V_i((p_0, .., p_N))`. Meanwhile, the user supplied a pattern