It is a prerequisite for edge-classes to implement this method.
It is a prerequisite for edge-classes to implement this method. Otherwise
they cannot be passed to a Graph.
Graph calls this method internally to obtain a new instance of the
edge passed to Graph with nodes of the type of the inner class NodeT
which itself contains the outer node.
(edgeCopy: StringAdd).self
(edgeCopy: StringFormat).self
(edgeCopy: ArrowAssoc[EdgeCopy[CC]]).x
(Since version 2.10.0) Use leftOfArrow instead
(edgeCopy: Ensuring[EdgeCopy[CC]]).x
(Since version 2.10.0) Use resultOfEnsuring instead
This trait is to be mixed in by every class implementing EdgeLike.