code: public EmbedBuilder setTimestamp(TemporalAccessor temporal)
      {
          if (temporal == null)
          {
              this.timestamp = null;
          }
          else if (temporal instanceof OffsetDateTime)
          {
              this.timestamp = (OffsetDateTime) temporal;
          }
          else
          {
              ZoneOffset offset;
              try
              {
                  offset = ZoneOffset.from(temporal);
              }
              catch (DateTimeException ignore)
              {
                  offset = ZoneOffset.UTC;
              }
              try
              {
                  LocalDateTime ldt = LocalDateTime.from(temporal);
                  this.timestamp = OffsetDateTime.of(ldt, offset);
              }
              catch (DateTimeException ignore)
              {
                  try
                  {
                      Instant instant = Instant.from(temporal);
                      this.timestamp = OffsetDateTime.ofInstant(instant, offset);
                  }
                  catch (DateTimeException ex)
                  {
                      throw new DateTimeException("Unable to obtain OffsetDateTime from TemporalAccessor: " +
                              temporal + " of type " + temporal.getClass().getName(), ex);
                  }
              }
          }
          return this; 
      }
docs: Sets the Timestamp of the embed.
  
  <p><b><a href="http://i.imgur.com/YP4NiER.png">Example</a></b>
  
  <p><b>Hint:</b> You can get the current time using {@link java.time.Instant#now() Instant.now()} or convert time from a
  millisecond representation by using {@link java.time.Instant#ofEpochMilli(long) Instant.ofEpochMilli(long)};
  
  @param  temporal
  the temporal accessor of the timestamp
  
  @return the builder after the timestamp has been set