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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 _finalize(self, fill_value=None, dtype=np.uint8, keep_palette=False, cmap=None):
 """Wrapper around 'finalize' method for backwards compatibility."""

        import warnings
        warnings.warn("'_finalize' is deprecated, use 'finalize' instead.",
                      DeprecationWarning)
        return self.finalize(fill_value, dtype, keep_palette, cmap)