If DOT fails to generate a graph can we sfdp instead?

I'm running into some cases where dot is failing to render graphs and in some cases, it actually causes javadocs to fail completely for a module. As a work around I've experimented with using graphiz's sfdp and have had some luck.

question, is there some mechanism I can use to increase the logging in order to identify the root cause of the failure.

finally is the output of sfdp the same output as dot? I have a branch whipped up that will run dot and if it fails, run sfdp before giving up. Is this the right approach? Edit: I can open a PR for this