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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_all_set_properties(self):
 """ Collect names of set properties. Returns: set: Set containing names of all properties, which are set to \ non-None value. """

        return set(
            property_name
            for property_name in worker_mapping().keys()
            if getattr(self, property_name) is not None
        )