Function getEPSG4326Extent

getEPSG4326Extent(layerId): JBoundaryBox | null
JMap.Layer.getEPSG4326Extent

Returns the extent of the layer in ESPG:4326 coordinates
Parameters
- layerId: JId
  The JMap layer id
Returns JBoundaryBox | null
Example
```
// returns the bounding box (JBoundaryBox) of the layer ID 3 in decimal degrees

console.log("WGS84 extent of layer id="3" is: ", JMap.Layer.getEPSG4326Extent(3))
```
Throws
Error if no layer found for the id or if layer is a group