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Iterating through a tree grid- breakiong out of the loop

Hi,
Currently i use the following code to iterate through treegrid

gridtree._h2.forEachChild(0,function(row){
var id=row.id;
//If condition is true
break;
} );

If i wish to break out of the loop based on a condition how do i do that?When i add a break statement ,javascript throws an error it says break cannot be added outside the loop, whats the correct way to do a conditional termination within a tree grid iteration