@CustomType.Setter
        public Builder namespace(String namespace) {
            if (namespace == null) {
              throw new MissingRequiredPropertyException("ServiceAccountSubject", "namespace");
            }
            this.namespace = namespace;
            return this;
        }
@return `namespace` is the namespace of matching ServiceAccount objects. Required.
sdk/java/src/main/java/com/pulumi/kubernetes/flowcontrol/v1beta1/outputs/ServiceAccountSubject.java