def close_left(self):
        """
        Closes every editors tabs on the left of the current one.
        """
        current_widget = self.widget(self.tab_under_menu())
        index = self.indexOf(current_widget)
        if self._try_close_dirty_tabs(tab_range=range(index)):
            while True:
                widget = self.widget(0)
                if widget != current_widget:
                    self.remove_tab(0)
                else:
                    break