code: @Override
      public Response update(String CorpNum, MgtKeyType KeyType, String MgtKey,
                             Taxinvoice taxinvoice) throws PopbillException {
          return update(CorpNum, KeyType, MgtKey, taxinvoice, null);
  
      }
docs: /* (non-Javadoc)
  @see com.popbill.api.TaxinvoiceService#update(java.lang.String, com.popbill.api.taxinvoice.MgtKeyType, java.lang.String, com.popbill.api.taxinvoice.Taxinvoice)