code: public static CommerceCurrency fetchByG_C(long groupId, String code,
  		boolean retrieveFromCache) {
  		return getPersistence().fetchByG_C(groupId, code, retrieveFromCache);
  	}
docs: Returns the commerce currency where groupId = &#63; and code = &#63; or returns <code>null</code> if it could not be found, optionally using the finder cache.
  
  @param groupId the group ID
  @param code the code
  @param retrieveFromCache whether to retrieve from the finder cache
  @return the matching commerce currency, or <code>null</code> if a matching commerce currency could not be found