public Rect BeginHorizontal(int id, params GUILayoutOption[] options)
{
SlideGroupInternal internal2 = (SlideGroupInternal) GUILayoutUtility.BeginLayoutGroup(GUIStyle.none, options, typeof(SlideGroupInternal));
internal2.SetID(this, id);
internal2.isVertical = false;
return internal2.m_FinalRect;
}