must be of arity >= 2
for hyperedges and of arity == 2
for edges.
(wEdgeCompanion: StringAdd).self
(wEdgeCompanion: StringFormat).self
(wEdgeCompanion: OuterNode[WEdgeCompanion[E]]).toString()
(wEdgeCompanion: ArrowAssoc[WEdgeCompanion[E]]).x
(Since version 2.10.0) Use leftOfArrow
instead
(wEdgeCompanion: Ensuring[WEdgeCompanion[E]]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
Everything common to weighted edge companion objects.