code: @Override
  	public com.liferay.commerce.product.model.CPInstance fetchCPInstanceByReferenceCode(
  		long companyId, String externalReferenceCode) {
  		return _cpInstanceLocalService.fetchCPInstanceByReferenceCode(companyId,
  			externalReferenceCode);
  	}
docs: Returns the cp instance with the matching external reference code and company.
  
  @param companyId the primary key of the company
  @param externalReferenceCode the cp instance's external reference code
  @return the matching cp instance, or <code>null</code> if a matching cp instance could not be found