def set_closable(self, closable):
        self.widget.SetClosable(closable)
Gets the date_value (may be None, basestring, float or
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/wx/wx_page.py/WxPage.set_closable--crossover with--dataset/ETHPy150Open marrow/mailer/marrow/mailer/message.py/Message._build_date_header_string