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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 get_filters(self):
 """ Returns the result filters :rtype: str or None """

        if self._filters:
            filters_list = self._filters
            if isinstance(filters_list[-1], Enum):
                filters_list = filters_list[:-1]
            return ' '.join(
                [fs.value if isinstance(fs, Enum) else fs[1] for fs in
                 filters_list]).strip()
        else:
            return None