private static Shape CreateSectionImage(PowerPointSlide refSlide, AgendaSection section)
{
var sectionFirstSlide = FindSectionFirstNonAgendaSlide(section.Index);
var shape = refSlide.InsertEntrySnapshotOfSlide(sectionFirstSlide);
AgendaShape.SetShapeName(shape, ShapePurpose.VisualAgendaImage, section);
return shape;
}