def chunks(self, fields, chunking_style, **kwargs):
    for chunk in self.index._chunk(self.base_object, chunking_style, **kwargs):
        with self.base_object._chunked_read(chunk):
            with self._chunked_read(chunk):
                self.get_data(fields)
                (yield self)
def chunks(self, fields, chunking_style, **kwargs):
    for chunk in self.index._chunk(self.base_object, chunking_style, **kwargs):
        with self.base_object._chunked_read(chunk):
            with self._chunked_read(chunk):
                self.get_data(fields)
                (yield self)