{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"///"}]}
    /// only a partial success - but it cannot be refined even further.
    /// reported as an error. If it is `Ok`, then it means it refined successful. If it is `Err`, then it may be
    fn blame_specific_expr_if_possible_for_derived_predicate_obligation(