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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_entity_by_class(self, entity_cls):
 """Fetch Entity record with Entity class details"""

        entity_qualname = fully_qualified_name(entity_cls)
        if entity_qualname in self._registry:
            return self._registry[entity_qualname]
        else:
            return self._find_entity_in_records_by_class_name(entity_cls.__name__)