public function get_link($key = 0, $rel = 'alternate')
	{
		$links = $this->get_links($rel);
		if ($links[$key] !== null)
		{
			return $links[$key];
		}
		else
		{
			return null;
		}
	}
public function get_link($key = 0, $rel = 'alternate')
	{
		$links = $this->get_links($rel);
		if ($links[$key] !== null)
		{
			return $links[$key];
		}
		else
		{
			return null;
		}
	}
public function get_link ( $ key = 0 , $ rel = 'alternate' ) { $ links = $ this -> get_links ( $ rel ) ; if ( $ links [ $ key ] !== null ) { return $ links [ $ key ] ; } else { return null ; } }
Get a single link for the item

@since Beta 3
@param int $key The link that you want to return.  Remember that arrays begin with 0, not 1
@param string $rel The relationship of the link to return
@return string|null Link URL
Get a single link for the item