public Optional<PersistentVolumeClaimVolumeSource> persistentVolumeClaim() {
        return Optional.ofNullable(this.persistentVolumeClaim);
    }
@return persistentVolumeClaimVolumeSource represents a reference to a PersistentVolumeClaim in the same namespace. More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims
sdk/java/src/main/java/com/pulumi/kubernetes/core/v1/outputs/Volume.java