public boolean changeExternalReference(String oldUrl, String newUrl) {return workbook.changeExternalReference(oldUrl, newUrl);}

public boolean changeExternalReference ( String oldUrl , String newUrl ) { return workbook . changeExternalReference ( oldUrl , newUrl ) ; }
public bool ChangeExternalReference(String oldUrl, String newUrl){return workbook.ChangeExternalReference(oldUrl, newUrl);}
