public InstagramSubscription radius(String radius){
		Preconditions.checkValidRadius(radius, "Invalid 'radius' key");
		
		this.params.put(Constants.RADIUS, radius);
		
		return this;
	}
public InstagramSubscription radius(String radius){
		Preconditions.checkValidRadius(radius, "Invalid 'radius' key");
		
		this.params.put(Constants.RADIUS, radius);
		
		return this;
	}
public InstagramSubscription radius ( String radius ) { Preconditions . checkValidRadius ( radius , "Invalid 'radius' key" ) ; this . params . put ( Constants . RADIUS , radius ) ; return this ; }
Configure the radius for geography subscription
@param radius The radius for geography subscription in metre
@return the {@link InstagramSubscription} instance for method chaining
Configure the radius for geography subscription