BendNetwork.has_edge
- BendNetwork.has_edge(edge, directed=True)
 Verify if the graph contains a specific edge.
- Parameters:
 - edgetuple[hashable, hashable]
 The identifier of the edge as a pair of node identifiers.
- directedbool, optional
 If True, the direction of the edge is taken into account.
- Returns:
 - bool
 True if the edge is present, False otherwise.
See also