if (vn2 instanceof VisualSyncComponent) {   //vn2
                    if (vn1 instanceof VisualFunctionComponent) {
                        writeJsonInFunction(vnet, (VisualFunctionComponent) vn1);
                    } else if (vn1 instanceof VisualQueueComponent) {
                        writeJsonInQueue(vnet, (VisualQueueComponent) vn1);