code: private static BitSet calculateFullStackTraceRequirements(final Collection<LogEntryValue>[][] logEntryValues) {
  		BitSet result = new BitSet(logEntryValues.length);
  		for (int i = 0; i < logEntryValues.length; ++i) {
  			Collection<LogEntryValue> values = logEntryValues[i][Level.ERROR.ordinal()];
  			if (values.contains(LogEntryValue.METHOD) || values.contains(LogEntryValue.FILE) || values.contains(LogEntryValue.LINE)) {
  				result.set(i);
  			}
  		}
  		return result;
  	}
docs: Calculates for which tag a full stack trace element with method name, file name and line number is required.
  
  @param logEntryValues
  Matrix with required log entry values
  @return Each set bit represents a tag that requires a full stack trace element