code: @Override
  	public CommerceTaxFixedRate findByC_C(long CPTaxCategoryId,
  		long commerceTaxMethodId) throws NoSuchTaxFixedRateException {
  		CommerceTaxFixedRate commerceTaxFixedRate = fetchByC_C(CPTaxCategoryId,
  				commerceTaxMethodId);
  
  		if (commerceTaxFixedRate == null) {
  			StringBundler msg = new StringBundler(6);
  
  			msg.append(_NO_SUCH_ENTITY_WITH_KEY);
  
  			msg.append("CPTaxCategoryId=");
  			msg.append(CPTaxCategoryId);
  
  			msg.append(", commerceTaxMethodId=");
  			msg.append(commerceTaxMethodId);
  
  			msg.append("}");
  
  			if (_log.isDebugEnabled()) {
  				_log.debug(msg.toString());
  			}
  
  			throw new NoSuchTaxFixedRateException(msg.toString());
  		}
  
  		return commerceTaxFixedRate;
  	}
docs: Returns the commerce tax fixed rate where CPTaxCategoryId = &#63; and commerceTaxMethodId = &#63; or throws a {@link NoSuchTaxFixedRateException} if it could not be found.
  
  @param CPTaxCategoryId the cp tax category ID
  @param commerceTaxMethodId the commerce tax method ID
  @return the matching commerce tax fixed rate
  @throws NoSuchTaxFixedRateException if a matching commerce tax fixed rate could not be found