code: public void addTraces(List<LogTrace<E>> traces) throws ParameterException {
                  Validate.notNull(traces);
                  for (LogTrace<E> trace : traces) {
                          addTrace(trace);
                  }
          }
docs: Adds a list of {@link LogTrace}s.
  
  @param traces Traces to add.
  @throws ParameterException If the given list of traces is null.