public List<List<String>> getLog() {
    List<List<String>> log = new ArrayList<List<String>>();
    for (String exceptionString : _rawLog) {
      List<String> exception = exceptionStringToListOfLines(exceptionString);
      log.add(exception);
    }
    return log;
  }
@return Returns the exception chain in the form of list of list of string.
    A list of string corresponds to an exception in the exception chain
    A string corresponds to a line in an exception
app/com/linkedin/drelephant/exceptions/LoggingEvent.java