code: def GetDecompressor(cls, compression_method):
      
      compression_method = compression_method.lower()
      decompressor = cls._decompressors.get(compression_method, None)
      if not decompressor:
        return None
  
      return decompressor()
docs: Retrieves the decompressor object for a specific compression method.
  
      Args:
        compression_method (str): compression method identifier.
  
      Returns:
        Decompressor: decompressor or None if the compression method does
            not exists.