<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def raiseAllWindows(self):
 """ Raises all application windows. """

        logger.debug("raiseAllWindows called")
        for mainWindow in self.mainWindows:
            logger.debug("Raising {}".format(mainWindow._instanceNr))
            mainWindow.raise_()