private final boolean isValidArchive(int id) {
	anInt646++;
	if (!isInitialized())
	    return false;
	if (id < 0 || indexTable.amountChildEntries.length <= id || (indexTable.amountChildEntries[id] == 0)) {
	    if (Class285.aBoolean4741)
		throw new IllegalArgumentException(Integer.toString(id));
	    return false;
	}
	return true;
    }