docs: @Nonnull
      public static byte[] encode( final long maxInactiveInterval, final long lastAccessedTime, final long thisAccessedTime ) {
          int idx = 0;
          final byte[] data = new byte[ 4 + 2 * 8 ];
          encodeNum( maxInactiveInterval, data, idx, 4 );
          encodeNum( lastAccessedTime, data, idx += 4, 8 );
          encodeNum( thisAccessedTime, data, idx += 8, 8 );
          return data;
      }