urned object allows duplicate labels.

        Returns
        -------
        Series or DataFrame
            The same type as the caller.

        See Also
        --------
        DataFrame.attrs : Global metadata applying to this dataset.
        DataFrame.flags : Global flags applying to this object.

        Notes
        -----
        This method returns a new object that's a view on the same data
        as the input. Mutating the input or the output values will be reflected
        in the other.

        This method is intended to be used in method chains.

        "Flags" differ from "metadata". Flags reflect properties of the
        pandas object (the Series or DataFrame). Metadata refer to properties
        of the dataset, and should be stored in :attr:`DataFrame.attrs`.

        Examples
        --------
        >>> df = pd.DataFrame({"A": [1, 2]})
        >>> df.flags.allows_duplicate_labels
        True
        >>> df2 = df.set_flags(allows_duplicate_labels=False)
        >>> df2.flags.allows_duplicate_labels
        False
        ©