public GraphvizEngine
Process a dot file. A Graphviz engine should be thread safe.
void init(java.util.function.Consumer<guru.nidi.graphviz.engine.GraphvizEngine> onOk,
java.util.function.Consumer<guru.nidi.graphviz.engine.GraphvizEngine> onError)
EngineResult execute(java.lang.String src, Options options, Rasterizer rasterizer)