ExternSheetReferenceToken (Keikai Spreadsheet Build 6.0.0 API)

All Known Implementing Classes:

Area3DPtg, Ref3DPtg, TablePtg
```
public interface ExternSheetReferenceToken
```
Should be implemented by any Ptg subclass that needs has an extern sheet index
For POI internal use only

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  String format2DRefAsString()
  
  int getExternSheetIndex()

- Method Detail
  - getExternSheetIndex
```
int getExternSheetIndex()
```
  - format2DRefAsString
```
String format2DRefAsString()
```
    Returns:
    
    formula text for this reference token without the qualifying sheet name