Base vertex class, extended by Port and Node (which is itself extended by Group). A vertex models some entity in your
app, and may have one or more edges to other vertices.
Gets all edges where this vertex is either the source or the target of the edge.
Note that this does not retrieve edges on any ports associated with this Vertex - for that,
Base vertex class, extended by Port and Node (which is itself extended by Group). A vertex models some entity in your app, and may have one or more edges to other vertices.