Function ImPlot_DragLineY 

pub unsafe extern "C" fn ImPlot_DragLineY(
    id: c_int,
    y: *mut f64,
    col: ImVec4_c,
    thickness: f32,
    flags: ImPlotDragToolFlags,
    out_clicked: *mut bool,
    out_hovered: *mut bool,
    out_held: *mut bool,
) -> bool