public static PhoneNumber get(final String phoneNumberId) throws Exception {
        assert(phoneNumberId != null);

        return get(BandwidthClient.getInstance(), phoneNumberId);
    }
public static PhoneNumber get ( final String phoneNumberId ) throws Exception { assert ( phoneNumberId != null ) ; return get ( BandwidthClient . getInstance ( ) , phoneNumberId ) ; }
Factory method for PhoneNumber. Returns PhoneNumber object
@param phoneNumberId the phone number id
@return the PhoneNumber
@throws IOException unexpected error.