code: public static CPInstance fetchByC_S(long CPDefinitionId, String sku,
  		boolean retrieveFromCache) {
  		return getPersistence()
  				   .fetchByC_S(CPDefinitionId, sku, retrieveFromCache);
  	}
docs: Returns the cp instance where CPDefinitionId = &#63; and sku = &#63; or returns <code>null</code> if it could not be found, optionally using the finder cache.
  
  @param CPDefinitionId the cp definition ID
  @param sku the sku
  @param retrieveFromCache whether to retrieve from the finder cache
  @return the matching cp instance, or <code>null</code> if a matching cp instance could not be found