public final function addWeeks( int $weeks = 1 )
      : DateTime
   {

      return $this->move( new \DateInterval( 'P' . \abs( $weeks ) . 'W' ), $weeks < 0 );

   }
public final function addWeeks( int $weeks = 1 )
      : DateTime
   {

      return $this->move( new \DateInterval( 'P' . \abs( $weeks ) . 'W' ), $weeks < 0 );

   }
public final function addWeeks ( int $ weeks = 1 ) : DateTime { return $ this -> move ( new \ DateInterval ( 'P' . \ abs ( $ weeks ) . 'W' ) , $ weeks < 0 ) ; }
Adds the defined number of weeks.

@param  integer $weeks The weeks to add (use a negative value to subtract/remove the weeks)
@return \Beluga\Date\DateTime Returns the current changed instance.
Adds the defined number of weeks .