https://graphviz.gitlab.io/graphviz/doxygen/mdichild_8cpp_source.html
Graphviz: cmd/gvedit/mdichild.cpp Source File
graphvizcmdgveditcppsource
https://manpages.opensuse.org/Leap-15.6/graphviz-gvedit/index.html
Manpages of graphviz-gvedit
manpagesgraphvizgvedit