tailURL
If defined,
tailURL is output as part of the tail label of the edge type: escString, default: ""
Also, this value is used near the tail node, overriding any URL value.
See limitation.
See also:
Valid on:- Edges
Note: map, svg only.
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Licensed under the Eclipse Public License 1.0.
https://www.graphviz.org/docs/attrs/tailURL/
