Has anyone worked out a way to embed Graphviz or PlantUML diagrams? For graphviz I know there is a viz.js library that other things like Confluence addons can use, and maybe I could set up a 3rd party service. But thought I’d ask around a bit first 
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I didn’t done anything yet but as long as there is an URL parameter rendering service it can be done by joining edges (node → node) cells into the URL. Something like
Image(
Concatenate(
'https://quickchart.io/graphviz?graph=',
EncodeForUrl(
'digraph g {
"node0"->"node1"
"node0"->"node2"
"node1"->"node3"
"node1"->"node4"
"node1"->"node5"
"node4"->"node3"
"node4"->"node6"
"node4"->"node10"
"node6"->"node3"
"node6"->"node7"
"node6"->"node9"
}'
)
)
)