{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"origin_expr:"}]}
    origin_expr: Option<&'tcx hir::Expr<'tcx>>,
    /// Otherwise there is no scrutinee and it could be e.g. from the type of a formal parameter.
    /// The span giving rise to the `expected` type, if one could be provided.