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

```
public interface AxisCalculateLabelRotationCallback
```
Interface to be implemented which can be used to change parameters in the scale during tick rotation.

Author:

Andrea "Stock" Stocchero

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onAfterCalculateLabelRotation(Axis axis, AxisItem item)`	Callback that runs after tick rotation is determined.
`void`	`onBeforeCalculateLabelRotation(Axis axis, AxisItem item)`	Callback that runs before tick rotation is determined.

- Method Detail
  - onBeforeCalculateLabelRotation
```
void onBeforeCalculateLabelRotation(Axis axis,
                                    AxisItem item)
```
    Callback that runs before tick rotation is determined.
    
    Parameters:
    
    axis - axis instance where this callback as been defined
    
    item - axis item instance
  - onAfterCalculateLabelRotation
```
void onAfterCalculateLabelRotation(Axis axis,
                                   AxisItem item)
```
    Callback that runs after tick rotation is determined.
    
    Parameters:
    
    axis - axis instance where this callback as been defined
    
    item - axis item instance