{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"///"}]}
    /// - An `OperandValue` *must* be this variant for any type for which
    ///   will not affect the shape of the data which determines if `Pair` will be used.
    /// [`LayoutTypeCodegenMethods::is_backend_scalar_pair`] returns `true`.