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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 shift(self, periods: int, axis: libinternals.BlockPlacement = 0, fill_value: Any = None) -> List['ExtensionBlock']: """ Shift the block by `periods`. Dispatches to underlying ExtensionArray and re-boxes in an ExtensionBlock. """

        return [
            self.make_block_same_class(
                self.values.shift(periods=periods, fill_value=fill_value),
                placement=self.mgr_locs, ndim=self.ndim)
        ]