IGPAPI
    Preparing search index...

    Variable SearchResultsTopTabDataSchemaConst

    SearchResultsTopTabDataSchema: Struct<
        {
            query: String;
            session: Struct<
                {
                    clientUuidRankToken: optionalKey<String>;
                    searchSessionId: String;
                    serpSessionId: String;
                    typeaheadSessionId: optionalKey<String>;
                },
            >;
        },
    > = ...

    What the Top tab carries on: the query and the search session with its SERP id filled.