public function fragment($fragment)
	{
		$this->fragment = ($fragment === NULL || $fragment == '') ? NULL : (string)$fragment;
		
		return $this;
	}
public function fragment($fragment)
	{
		$this->fragment = ($fragment === NULL || $fragment == '') ? NULL : (string)$fragment;
		
		return $this;
	}
public function fragment ( $ fragment ) { $ this -> fragment = ( $ fragment === NULL || $ fragment == '' ) ? NULL : ( string ) $ fragment ; return $ this ; }
Set or remove the fragment part of this URI.

@param string $fragment
@return UriBuilder
Set or remove the fragment part of this URI .