docstr: Save workbook to disk.
docstr_tok: ["Save","workbook","to","disk","."]
code: def _save(self) -> None:
      """
      Save workbook to disk.
      """
      for sheet in self.sheets.values():
          self.book.spreadsheet.addElement(sheet)
      self.book.save(self._handles.handle)
  
file_path: pandas/pandas/io/excel/_odswriter.py
imports: from __future__ import annotations
  from collections import defaultdict
  import datetime
  import json
  from typing import TYPE_CHECKING, Any, DefaultDict, cast, overload
  from pandas.io.excel._base import ExcelWriter
  from pandas.io.excel._util import combine_kwargs, validate_freeze_panes
label_desc: Use image node_id 4 for calling the ODSWriter obj's underlying member method code with example usage: obj._save() without return types