@CustomType.Setter
        public Builder driver(String driver) {
            if (driver == null) {
              throw new MissingRequiredPropertyException("AllowedFlexVolume", "driver");
            }
            this.driver = driver;
            return this;
        }
@return driver is the name of the Flexvolume driver.
sdk/java/src/main/java/com/pulumi/kubernetes/policy/v1beta1/outputs/AllowedFlexVolume.java