Function steamworks_sys::SteamAPI_ISteamUGC_AddItemToFavorites

pub unsafe extern "C" fn SteamAPI_ISteamUGC_AddItemToFavorites(
    self_: *mut ISteamUGC, 
    nAppId: AppId_t, 
    nPublishedFileID: PublishedFileId_t
) -> SteamAPICall_t