How to create double labelled edges in Graphviz?
<p>I would like to create more than one label for one edge. The result I'm interested in looks like this:</p>

<p><a href="https://i.stack.imgur.com/PD7jU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PD7jU.png" alt="enter image description here"></a></p>

<p>Note that the edge {0,2} has two labels: e and z. One is above the edge, the other one - below. This is the exact outcome I want. How can I achieve this?</p>