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

```
public interface BeforeEventHook
```
Called before processing the specified 'event'.
If any plugin returns false, the event will be discarded.

Author:

Andrea "Stock" Stocchero

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`onBeforeEvent(IsChart chart, PluginEventArgument argument)`	Called before processing the specified 'event'. If any plugin returns `false`, the event will be discarded.

- Method Detail
  - onBeforeEvent
```
boolean onBeforeEvent(IsChart chart,
                      PluginEventArgument argument)
```
    Called before processing the specified 'event'.
    If any plugin returns false, the event will be discarded.
    
    Parameters:
    
    chart - the chart instance.
    
    argument - instance which contains event context
    
    Returns:
    
    false to discard the event.