Optional
Search session carrying the shared search_session_id. Optional: when absent the leg starts its own session (withTypeaheadSession), so the method is usable standalone — search.search threads the same session from its typeahead leg into the SERP leg.
search_session_id
withTypeaheadSession
search.search
Search session carrying the shared
search_session_id. Optional: when absent the leg starts its own session (withTypeaheadSession), so the method is usable standalone —search.searchthreads the same session from its typeahead leg into the SERP leg.