public RequestLogger dateFormatter(final DateTimeFormatter formatter) {
    requireNonNull(formatter, "Formatter required.");
    return dateFormatter(ts -> formatter.format(Instant.ofEpochMilli(ts)));
  }
public RequestLogger dateFormatter(final DateTimeFormatter formatter) {
    requireNonNull(formatter, "Formatter required.");
    return dateFormatter(ts -> formatter.format(Instant.ofEpochMilli(ts)));
  }
public RequestLogger dateFormatter ( final DateTimeFormatter formatter ) { requireNonNull ( formatter , "Formatter required." ) ; return dateFormatter ( ts -> formatter . format ( Instant . ofEpochMilli ( ts ) ) ) ; }
Override the default date formatter.

@param formatter New formatter to use.
@return This instance.
Override the default date formatter .