How to Access Subgraphs of an Existing Graph in Boost

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I read a graph using read graphviz() and discovered it has subgraphs.

However, I can't locate anywhere in the Boost documentation that describes how to access these subgraphs.

I can only locate create subgraph(), which obviously does not work with existing subgraphs.

What am I overlooking?

Thank you in advance.
Aug 11, 2022 in C++ by Nicholas
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