if (bytecodeSet == null) return;
	public void execute() throws DataflowAnalysisException, CFGBuilderException {		BitSet bytecodeSet = classContext.getBytecodeSet(method);		if (bytecodeSet.get(Constants.MONITORENTER) || bytecodeSet.get(Constants.MONITOREXIT)) {			this.lockDataflow = classContext.getLockDataflow(method);		} else if (method.isSynchronized()) {			this.vnaDataflow = classContext.getValueNumberDataflow(method); // will need this later		}	}