code: @Override
  	public CommercePaymentMethodGroupRel fetchByG_E(long groupId,
  		String engineKey) {
  		return fetchByG_E(groupId, engineKey, true);
  	}
docs: Returns the commerce payment method group rel where groupId = &#63; and engineKey = &#63; or returns <code>null</code> if it could not be found. Uses the finder cache.
  
  @param groupId the group ID
  @param engineKey the engine key
  @return the matching commerce payment method group rel, or <code>null</code> if a matching commerce payment method group rel could not be found