public function setISODate( $year, $week, $day = null )
      : DateTime
   {

      parent::setISODate( $year, $week, $day );

      return $this;

   }
public function setISODate( $year, $week, $day = null )
      : DateTime
   {

      parent::setISODate( $year, $week, $day );

      return $this;

   }
public function setISODate ( $ year , $ week , $ day = null ) : DateTime { parent :: setISODate ( $ year , $ week , $ day ) ; return $ this ; }
Sets a date by ISO-8601 conform data.

@param  integer $year The year
@param  integer $week The Week number (Weeks begins at monday)
@param  integer $day  The day
@return \Beluga\Date\DateTime
Sets a date by ISO - 8601 conform data .