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