public void setVirtualService(VirtualServiceBackend virtualService) {
        this.virtualService = virtualService;
    }
<p>
Specifies a virtual service to use as a backend.
</p>

@param virtualService
       Specifies a virtual service to use as a backend.
aws-java-sdk-appmesh/src/main/java/com/amazonaws/services/appmesh/model/Backend.java