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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 _dictionary(self):
 # type: () -> Dict[str, Any] """A dictionary representing the loaded configuration. """

        # NOTE: Dictionaries are not populated if not loaded. So, conditionals
        #       are not needed here.
        retval = {}

        for variant in self._override_order:
            retval.update(self._config[variant])

        return retval