public Optional<Output<String>> error() {
        return Optional.ofNullable(this.error);
    }
@return Error is to record the problem with the service port The format of the error shall comply with the following rules: - built-in error values shall be specified in this file and those shall use
  CamelCase names
- cloud provider specific error values must have names that comply with the
  format foo.example.com/CamelCase.
sdk/java/src/main/java/com/pulumi/kubernetes/core/v1/inputs/PortStatusArgs.java