What is the LocalDate Utils like StringUtils

  private ClientIdentifier(final Client client, final CodeValue documentType, final String documentKey,final LocalDate validity, final String description) {
    this.client = client;
    this.documentType = documentType;
    this.documentKey = StringUtils.defaultIfEmpty(documentKey, null);
    i am confused in this part //this.validity = LocaleUtils.defaultIfEmpty(validity,null);
    this.description = StringUtils.defaultIfEmpty(description, null);
}

I am passing LocalDate but don't know which utility to use for checking defualtIfEmpty