def add_chartsheet(self, name=None):
        return self._add_sheet(name, is_chartsheet=True)
Set the closable flag for the underlying widget.
dataset/ETHPy150Open jmcnamara/XlsxWriter/xlsxwriter/workbook.py/Workbook.add_chartsheet--crossover with--dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/qt/qt_dock_item.py/QtDockItem.set_closable