Function layerDataPath

layerDataPath(config: LayerDataShape | null | undefined): string | null
Resolves the data path a layer configuration declares, in either shape.

Accepts the normalised dataFile as-is when present — a caller that already ran the profile loader must not see its value rebuilt underneath it — and derives it from data.file otherwise.
Parameters
- config: LayerDataShape | null | undefined
  A layer configuration, raw from disk or normalised by the profile loader.
Returns string | null
The path relative to the layer directory (e.g. "data/sites.geojson"), or null when the layer declares no data file at all — which is legitimate: a tile layer or a layer with a direct url has none.
Example
```
layerDataPath({ data: { directory: "data", file: "sites.geojson" } }); // "data/sites.geojson"
layerDataPath({ data: { file: "sites.geojson" } });                    // "data/sites.geojson"
layerDataPath({ dataFile: "raw/sites.geojson" });                      // "raw/sites.geojson"
layerDataPath({ type: "tile" });                                       // null
```
- Defined in src/utils/general/layer-data-path.ts:57