Function isGeometryTypeValidForLayer

isGeometryTypeValidForLayer(layerId, geometryType): boolean
JMap.Geometry.getPolygonFeature

Returns true if the geometry type match the Layer geometry type, else false.
Parameters
- layerId: JId
  the JMap layer id
- geometryType: "Point" | "MultiPoint" | "LineString" | "MultiLineString" | "Polygon" | "MultiPolygon" | "GeometryCollection"
  the geometry type
Returns boolean
Throws
if layer not found or layer is a layer group

Example
```
// returns true if the layer id=3 has "Polygon" features, else false
const distance = JMap.Geometry.isGeometryTypeValidForLayer(3, "Polygon")
```