code: @Override
  	public CPDefinition fetchCPDefinitionByReferenceCode(long companyId,
  		String externalReferenceCode) {
  		return cpDefinitionPersistence.fetchByC_ERC(companyId, null);
  	}
docs: Returns the cp definition with the matching external reference code and company.
  
  @param companyId the primary key of the company
  @param externalReferenceCode the cp definition's external reference code
  @return the matching cp definition, or <code>null</code> if a matching cp definition could not be found