{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
        let module_id = format!("{prefix_id}::{module_name}");
            .unwrap_or_else(|| "[mod without name]".to_owned());
        let module_children = discover_tests_in_module(db, c, module_id.clone(), only_in_this_file);