This method will be called by the consumer such as a Graph
factory and
must return the label of the edge the edge stream cursor has been moved to.
(attributedAdapter: StringAdd).self
(attributedAdapter: StringFormat).self
(attributedAdapter: ArrowAssoc[AttributedAdapter]).x
(Since version 2.10.0) Use leftOfArrow
instead
(attributedAdapter: Ensuring[AttributedAdapter]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
Adapter submitting the custom attributes of an edge.