ExtendedInteraction (Charba - J2CL and GWT charts library based on CHART.JS)

```
@JsFunction
public interface ExtendedInteraction
```
This class can be used when a custom interaction mode is already available and implemented in java script (for instance, controllers or plugins which added a specific interaction mode).
Java script FUNCTION callback called to invoke a custom interactioner.

Author:

Andrea "Stock" Stocchero

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ArrayObject`	`call(Chart chart, NativeObject event, NativeObject options, boolean useFinalPosition)`	Method of function to be called to invoke a custom interaction mode.

- Method Detail
  - call
```
ArrayObject call(Chart chart,
                 NativeObject event,
                 NativeObject options,
                 boolean useFinalPosition)
```
    Method of function to be called to invoke a custom interaction mode.
    
    Parameters:
    
    chart - the chart we are returning items from
    
    event - the event we are find things at
    
    options - options to use
    
    useFinalPosition - use final element position (animation target)
    
    Returns:
    
    items that are found