The concept Kinetic::Delaunay_triangulation_event_log_visitor_2 provides a model of Kinetic::DelaunayTriangulationVisitor_2 and Kinetic::EventLogVisitor which logs edge flip events.
Kinetic::DelaunayTriangulationVisitor_2, Kinetic::EventLogVisitor
Kinetic::Delaunay_triangulation_2<Traits, Triangulation, Visitor>