def _gen_labels_columns(self, list_columns: List[str]) -> None:
        """
        Auto generates pretty label_columns from list of columns
        """
        for col in list_columns:
            if not self.label_columns.get(col):
                self.label_columns[col] = self._prettify_column(col)

        Auto generates pretty label_columns from list of columns
        
flask_appbuilder/api/__init__.py