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                        - """Abstract interface for document cleaner implementations."""
 - from abc import ABC, abstractmethod
 - 
 - 
 - class BaseCleaner(ABC):
 -     """Interface for clean chunk content.
 -     """
 - 
 -     @abstractmethod
 -     def clean(self, content: str):
 -         raise NotImplementedError
 - 
 
 
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