def getCellWidget(self, row, col):
        return self.sheet.getCell(row, col)
Handle 'sent' status reported by DocuSign callback.
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/packages/spreadsheet/spreadsheet_tab.py/StandardWidgetSheetTab.getCellWidget--crossover with--dataset/ETHPy150Open novafloss/django-docusign/django_docusign/views.py/SignatureCallbackView.signature_sent