{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
            let mod_id = self.tcx.parent_module(expr.hir_id).to_def_id();
        if let SelfSource::MethodCall(expr) = source {
            for (fields, args) in self.get_field_candidates_considering_privacy_for_diag(