Can I get the file name but not only file content in preProcessMd?

Here is my code, I wanna to get the path or file name here
``` javascript
function preProcessMd() { // or here ?
return through (function (data, ...args) {
console.log(args);
pageBreak = '\n\n

\n\n';
this.queue(loadNunjucks(data) + pageBreak);
});
}
```