public function get_restriction($key = 0)
	{
		$restrictions = $this->get_restrictions();
		if (isset($restrictions[$key]))
		{
			return $restrictions[$key];
		}

		return null;
	}
public function get_restriction($key = 0)
	{
		$restrictions = $this->get_restrictions();
		if (isset($restrictions[$key]))
		{
			return $restrictions[$key];
		}

		return null;
	}
public function get_restriction ( $ key = 0 ) { $ restrictions = $ this -> get_restrictions ( ) ; if ( isset ( $ restrictions [ $ key ] ) ) { return $ restrictions [ $ key ] ; } return null ; }
Get a single restriction

@param int $key
@return SimplePie_Restriction|null
Get a single restriction