public Builder controller(String controller) {
            return controller(Output.of(controller));
        }
@param controller controller refers to the name of the controller that should handle this class. This allows for different &#34;flavors&#34; that are controlled by the same controller. For example, you may have different parameters for the same implementing controller. This should be specified as a domain-prefixed path no more than 250 characters in length, e.g. &#34;acme.io/ingress-controller&#34;. This field is immutable.

@return builder
sdk/java/src/main/java/com/pulumi/kubernetes/networking/v1/inputs/IngressClassSpecArgs.java