update import plantUML

models/workflow/graph/graph.go

@@ -15,6 +15,15 @@ type Graph struct {
 	Links   []GraphLink          `bson:"links" json:"links" default:"{}" validate:"required"` // Links is the list of links between elements in the graph
 }
 
+func NewGraph() *Graph {
+	return &Graph{
+		Partial: false,
+		Zoom:    1,
+		Items:   map[string]GraphItem{},
+		Links:   []GraphLink{},
+	}
+}
+
 func (g *Graph) Clear(id string) {
 	realItems := map[string]GraphItem{}
 	for k, it := range g.Items {