* In case of error provides pointer to failed instance identifier,
* offset on which failure occurred with explanation.
*
* @param condition Fails parsing if {@code condition} is false
* @param errorMsg Error message which will be provided to user.
* In case of error provides pointer to failed instance identifier,
* offset on which failure occurred with explanation.
*
* @param condition Fails parsing if {@code condition} is false
* @param errorMsg Error message which will be provided to user.