Gets an index identifier for this connection point. This is useful for selecting
a connection point calculator when there are multiple connection points on the same edge of a node.
Namespace:
Mindscape.WpfDiagramming.FoundationAssembly: Mindscape.WpfDiagramming.Foundation (in Mindscape.WpfDiagramming.Foundation.dll)
Version: 2.0.0.0 (2.0.0.0)