Reimplements the :meth:`Basic_QPlainTextEdit.resizeEvent` method.

        :param event: Event.
        :type event: QEvent

def resizeEvent(self, event):
        """
        Reimplements the :meth:`Basic_QPlainTextEdit.resizeEvent` method.

        :param event: Event.
        :type event: QEvent
        """

        Basic_QPlainTextEdit.resizeEvent(self, event)
        self.__margin_area_LinesNumbers_widget.update_geometry()