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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def on_startup(self):
 """ Defines the slot triggered by Framework startup. :return: Method success. :rtype: bool """


        LOGGER.debug("> Calling '{0}' Component Framework 'on_startup' method.".format(self.__class__.__name__))

        self.refresh_nodes.emit()
        return True