return createUnknown(className);
return createUnknown(className, sourceFile);
	public static SourceLineAnnotation fromVisitedInstructionRange(BetterVisitor visitor, int startPC, int endPC) {		LineNumberTable lineNumberTable = getLineNumberTable(visitor);		String className = visitor.getBetterClassName();		if (lineNumberTable == null)			return createUnknown(className);		int startLine = lineNumberTable.getSourceLine(startPC);		int endLine = lineNumberTable.getSourceLine(endPC);		return new SourceLineAnnotation(className, startLine, endLine);	}