Would it be difficult to get a printer like [DotExporter](https://github.com/soot-oss/SootUp/blob/develop/sootup.core/src/main/java/sootup/core/util/DotExporter.java) for this? Essentially, it would build the CFG for all methods and then add edges between callees and callers?