code: private void displayWorkflow(Workflow w) {
          Graph graph = new Graph(w.getWorkflowName(), Graph.DIGRAPH);
          nodes.clear();
          //Create the nodes
          w.getWorkflowStepList().forEach(step -> {
              addStep(step, graph);
              //Now add the links
              step.getSourceTransitions().forEach(t -> {
                  addStep(t.getWorkflowStepSource(), graph);
                  addStep(t.getWorkflowStepTarget(), graph);
                  Subgraph.Edge edge
                          = graph.addEdge(nodes.get(t.getWorkflowStepSource()
                                  .getWorkflowStepPK().getId()),
                                  nodes.get(t.getWorkflowStepTarget()
                                          .getWorkflowStepPK().getId()));
                  edge.setParam("label", TRANSLATOR.translate(t.getTransitionName()));
                  //Workaround https://github.com/pontusbostrom/VaadinGraphvizComponent/issues/9
                  edge.setDest(nodes.get(t.getWorkflowStepTarget()
                          .getWorkflowStepPK().getId()));
                  edges.put(TRANSLATOR.translate(t.getTransitionName()),
                          new AbstractMap.SimpleEntry<>(
                                  nodes.get(t.getWorkflowStepSource()
                                          .getWorkflowStepPK().getId()), edge));
              });
          });
          diagram.drawGraph(graph);
      }
docs: Create workflow from database
  
  @param w workflow to create from