Function SteamAPI_ISteamTimeline_AddRangeTimelineEvent 

pub unsafe extern "C" fn SteamAPI_ISteamTimeline_AddRangeTimelineEvent(
    self_: *mut ISteamTimeline,
    pchTitle: *const c_char,
    pchDescription: *const c_char,
    pchIcon: *const c_char,
    unIconPriority: uint32,
    flStartOffsetSeconds: f32,
    flDuration: f32,
    ePossibleClip: ETimelineEventClipPriority,
) -> TimelineEventHandle_t