code: public ListVirtualNodesResult withVirtualNodes(VirtualNodeRef... virtualNodes) {
          if (this.virtualNodes == null) {
              setVirtualNodes(new java.util.ArrayList<VirtualNodeRef>(virtualNodes.length));
          }
          for (VirtualNodeRef ele : virtualNodes) {
              this.virtualNodes.add(ele);
          }
          return this;
      }
docs: <p>
  The list of existing virtual nodes for the specified service mesh.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setVirtualNodes(java.util.Collection)} or {@link #withVirtualNodes(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param virtualNodes
  The list of existing virtual nodes for the specified service mesh.
  @return Returns a reference to this object so that method calls can be chained together.