code: public TimezoneOffsetFrom setTimezoneOffsetFrom(UtcOffset offset) {
  		TimezoneOffsetFrom prop = new TimezoneOffsetFrom(offset);
  		setTimezoneOffsetFrom(prop);
  		return prop;
  	}
docs: Sets the UTC offset that the timezone observance transitions from.
  @param offset the offset
  @return the property that was created
  @see <a href="http://tools.ietf.org/html/rfc5545#page-104">RFC 5545
  p.104-5</a>
  @see <a href="http://tools.ietf.org/html/rfc2445#page-99">RFC 2445
  p.99-100</a>