Constructor
# <ZoomControls map orientation />
        A map control group with zoom in and zoom out buttons
    
    
    
        PropTypes:
| Name | Type | Required | Description | Default | 
|---|---|---|---|---|
map | 
          object | Yes | reference to Openlayers map object | |
orientation | 
          enum | No | the orientation of the zoom controls | 
- Since:
 - 0.1.0