public GreedyPartitioner(SIRStream str, WorkEstimate work, int target) {
public GreedyPartitioner(SIRStream str, WorkEstimate work, int target, boolean joinersNeedTiles) {
    public GreedyPartitioner(SIRStream str, WorkEstimate work, int target) {	this.str = str;	this.target = target;	this.work = work;    }