Finds and returns an edge in a graph given two items.

capi

find-graph-edge graph from to => edge

graph

A graph-pane.

from

An item in graph .

to

edge

A graph edge, or nil .

nil

The generic function find-graph-edge finds the edge that goes from the node corresponding to from to the node corresponding to to .

find-graph-edge

If there is no such edge, find-graph-edge returns nil .

find-graph-node graph-pane