code: public boolean isValidPostalCodeDefaultYes (@Nullable final Locale aCountry, @Nullable final String sPostalCode)
    {
      return isValidPostalCode (aCountry, sPostalCode).getAsBooleanValue (true);
    }
docs: Check if the passed postal code is valid for the passed country. If no
  information for that specific country is defined, the postal code is
  assumed valid!
  
  @param aCountry
  The country to check. May be <code>null</code>.
  @param sPostalCode
  The postal code to check. May be <code>null</code>.
  @return <code>true</code> if the postal code is valid for the passed
  country or if no information for that country are present,
  <code>false</code> otherwise.