protected boolean instanceEscapes(InvokeInstruction inv) {
protected boolean instanceEscapes(InvokeInstruction inv, int instanceArgNum) {
		protected boolean instanceEscapes(InvokeInstruction inv) {			ConstantPoolGen cpg = getCPG();			String className = inv.getClassName(cpg);			try {				// FIXME: is this right?				return !Repository.instanceOf(className, "java.io.InputStream");			} catch (ClassNotFoundException e) {				bugReporter.reportMissingClass(e);				return true;			}		}