docs: function CircularRegion (identifier, latitude, longitude, radius){
  	// Call the parent constructor, making sure (using Function#call)
  	// that "this" is set correctly during the call
  	Region.call(this, identifier);
  
  	CircularRegion.checkLatitude(latitude);
  	CircularRegion.checkLongitude(longitude);
  	CircularRegion.checkRadius(radius);
  
  	this.latitude = latitude;
  	this.longitude = longitude;
  	this.radius = radius;
  
  	// {String} typeName A String holding the name of the Objective-C type that the value
  	//    this will get converted to once the data is in the Objective-C runtime.
  	this.typeName = 'CircularRegion';
    
  }