Adds an edge to the adjacency list of the node which is an underlying List
implementation. No checking is done on the edge (duplication, looping...),
it is simply added to the list.
See Also:Node.add(Edge)
Returns all nodes that are incident with adjacent edges minus itself. This
iterator is generated by calculating an underlying collection upon each
method call.
See Also:org.geotools.graph.structure.Graphable.getRelated