def setup_derived_columns(self):
        for dim in self._dims:
            dim_selection = self[dim]
            if dim_selection is not None and isinstance(dim_selection, str) and \
                dim_selection in special_columns and dim_selection not in \
                    self.df.columns.tolist():
                        self._data[dim_selection] = special_columns[dim_selection](
                            self._data)
Remove a given folder.
dataset/ETHPy150Open bokeh/bokeh/bokeh/charts/data_source.py/ChartDataSource.setup_derived_columns--crossover with--dataset/ETHPy150Open contextio/Python-ContextIO/contextio/lib/resources/folder.py/Folder.delete