IGPAPI
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    Type Alias MobileNavigationSource

    MobileNavigationSource:
        | "cold_start"
        | "warm_start"
        | "button"
        | "main_direct"
        | "main_search"
        | "search_result"

    How the app reached a screen, as its navigation logger names it: cold_start (first screen of an app start), warm_start (brought back from background), button (an in-app action), main_<tab> (a bottom-tab switch), and search_result (a SERP opened from the search field's submit).