RasterTabbar.getTabByIndex( index )
Returns the tab item at the given index. To know the number of tabs in the tab bar use thegetTabCount() method.
    Parameters
| Name | Type | Description | |
|---|---|---|---|
| index | number | Zero-based index of the tab. | 
Returns
| Type | Description | 
|---|---|
| object | The tab item at the given index. Returns if the index
is out of range. | 
