How to filter symbols with .addSymbol mabox_gl flutter - mapbox

Question

I have a bit of an issue.
I am adding symbols to my map using the .addSymbol function
Future<Symbol> addSymbol(SymbolOptions options, [Map<dynamic, dynamic>? data])
And when doing so the name of layer that's get added seems to be generated. The layer name can look like this:
4jmVTazvBD_0
And if I then do
mapController.setFilter("4jmVTazvBD_0",true) // or false
Then it filter it. But since the layerId changes every time the app starts and adds the symbols its not possible.
When I add my symbols I first get them from backend and then I loop through every item in the response from backend and add them like this:
mapController.addSymbol(
SymbolOptions(
draggable: true,
iconImage: item?.properties?.image,
geometry:
LatLng(item!.location!.latitude!, item.location!.longitude!),
iconSize: 1),
{
"type": item.properties?.type,
"annotation": item,
"id": item.id,
"lat": item.location?.latitude,
"lng": item.location?.longitude
},
);
Do some someone know how to filter them, just want to be able to toggle them visible or not.
My first approach*
I have tested to add a symbollayer and then add the object with points but nothing shows up.
I have tried the following with adding a symbolLayer:
I have a list with maps that I save that looks like this:
List<Map<String, dynamic>> features = [];
Map<String, dynamic> _symbols = {};
First I setup some thing in the onStyleLoadedCallbak like this:
void _onStyleLoadedCallback() async {
await mapController.addGeoJsonSource("points", _symbols);
await mapController.addSymbolLayer(
"points",
"symbols",
SymbolLayerProperties(
iconImage: "{type}",
iconSize: 2,
iconAllowOverlap: true,
),
);
}
addSymbolsToList(Annotations? item) {
if (features.any((element) => element["id"] == item?.id)) {
} else {
features.add(
{
"type": "Feature",
"id": item?.id,
"properties": {
"type": "pin_offline",
},
"geometry": {
"type": "Point",
"coordinates": [item?.location?.longitude, item?.location?.latitude]
}
},
);
}
}
But the code I tested when creating a symbolLayer don't add my symbols.