Function Marker

Marker(props: MarkerProps): null | ReactPortal
Marker component.

A Marker is a 2D component anchored to a position on the map. To animate the Marker when its target changes, see AnimatedMarker.
Parameters
- props: MarkerProps
Returns null | ReactPortal
Example
```
<Marker target={mapData.getByType('space')[0]}>
 <div>Hello, world!</div>
</Marker>
```