import java.util.$*$;

public class Tree$234$Iterator implements Iterator $\{$

$//$ Your code here

public Tree$234$Iterator$($Node$234$ treeRootNode$)\{$

$//$ Your code here

$\}$

public boolean hasNext$()\{$

$//$ Your code here $($remove placeholder line below$)$

return false;

$\}$

public Integer next$()\{$

$//$ Your code here $($remove placeholder line below$)$

return $0$;

$\}$

$\}$