code: @Deprecated
      public static StringBuilder epoch(long timeMillis) {
          // 24 (human readable part) + 2 (parens) + 19 (max digits of a long integer)
          final StringBuilder buf = new StringBuilder(45);
          appendEpochMillis(buf, timeMillis);
          return buf;
      }
docs: Formats the given epoch time in milliseconds to typical human-readable format
  "yyyy-MM-dd'T'HH:mm:ss.SSSX".
  
  @deprecated Use {@link #epochMillis(long)}.
  
  @param timeMillis epoch time in milliseconds
  
  @return the human readable string representation of the given epoch time