convert between geojson and pbf

I use vt2geojson to extract the transportation layers in the pbf file，Is there a way to convert this geojson back to pbf？
```
vt2geojson({
uri: './5-19-12.pbf',
layer: 'transportation',
z: 5,
x: 19,
y: 12
}, function (err, geoJson) {
if (err) throw err;
console.log(geoJson)
});
```

Start with the vt2geojson(...) entry point and its handling of the transportation layer in the supplied PBF tile. Check whether the project exposes any serialization path from GeoJSON to PBF; done would be a documented, working reverse conversion, with behavior for the shown z/x/y tile and layer made clear.

Written by the indexing model from the issue text.