String sourceFileName = AnalysisContext.currentAnalysisContext().lookupSourceFile(className);
	public static FieldAnnotation isWrite(Instruction ins, ConstantPoolGen cpg) {		if (ins instanceof PUTFIELD || ins instanceof PUTSTATIC) {			FieldInstruction fins = (FieldInstruction) ins;			String className = fins.getClassName(cpg);			String sourceFileName = AnalysisContext.currentAnalysisContext().lookupSourceFile(className);			return new FieldAnnotation(className, fins.getName(cpg), fins.getSignature(cpg), fins instanceof PUTSTATIC);		} else			return null;	}