/**
* Create a new POIXMLDocumentPart using the supplied descriptor. This method is used when Adding new parts
* to a document, for example, when Adding a sheet to a workbook, slide to a presentation, etc.
*
* @param descriptor describes the object to create
* @return A new instance of a POIXMLDocumentPart.
*/
public abstract POIXMLDocumentPart CreateDocumentPart(POIXMLRelation descriptor);
public POIXMLDocumentPart CreateRelationship(POIXMLRelation descriptor, POIXMLFactory factory, int idx)
{
return(CreateRelationship(descriptor, factory, idx, false));
}