this.jsrMap = new IdentityHashMap<InstructionHandle, Context>();
	public BetterCFGBuilder2(MethodGen methodGen) {		this.methodGen = methodGen;		this.cpg = methodGen.getConstantPool();		this.exceptionHandlerMap = new ExceptionHandlerMap(methodGen);		this.usedInstructionSet = new BitSet();		this.contextWorkList = new LinkedList<Context>();	}