this.collector = collector;
	public NullDerefAndRedundantComparisonFinder(ClassContext classContext, Method method, IsNullValueDataflow invDataflow) {		this.classContext = classContext;		this.method = method;		this.invDataflow = invDataflow;				this.redundantBranchList = new LinkedList<RedundantBranch>();		this.definitelySameBranchSet = new BitSet();		this.definitelyDifferentBranchSet = new BitSet();		this.undeterminedBranchSet = new BitSet();	}