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

```
public interface FeatureFilterCallback
```
Callback to implement to have a new Feature list creation with all elements that pass the test implemented by this callback.

Author:

Andrea "Stock" Stocchero

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`filter(Feature feature, int index)`	Return a value that coerces to `true` to keep the `Feature`, or to `false` otherwise.

- Method Detail
  - filter
```
boolean filter(Feature feature,
               int index)
```
    Return a value that coerces to true to keep the Feature, or to false otherwise.
    
    Parameters:
    
    feature - current element being processed in the list.
    
    index - the index of the current element being processed in the list
    
    Returns:
    
    a value that coerces to true to keep the Feature, or to false otherwise