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

```
public interface AxisUpdateCallback
```
Interface to be implemented which can be used to change parameters in the scale during updating.

Author:

Andrea "Stock" Stocchero

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onAfterUpdate(Axis axis, AxisItem item)`	Callback that runs at the end of the update process.
`void`	`onBeforeUpdate(Axis axis, AxisItem item)`	Callback called before the update process starts.

- Method Detail
  - onBeforeUpdate
```
void onBeforeUpdate(Axis axis,
                    AxisItem item)
```
    Callback called before the update process starts.
    
    Parameters:
    
    axis - axis instance where this callback as been defined
    
    item - axis item instance
  - onAfterUpdate
```
void onAfterUpdate(Axis axis,
                   AxisItem item)
```
    Callback that runs at the end of the update process.
    
    Parameters:
    
    axis - axis instance where this callback as been defined
    
    item - axis item instance