InDesign Scripting: Is "Remap Break, Whitespace and Special Characters" scriptable?

I’m trying to determine whether the “Remap Break, Whitespace and Special Characters” option in InDesign’s Export XML dialog can be controlled via scripting.

The scripting DOM exposes:

app.xmlExportPreferences.characterReferences = true;

and the property is readable/writable. However, after extensive testing in InDesign 2024/2026, setting it to true or false:

  • does not change the state of the Export XML checkbox,
  • does not change the exported XML, and
  • app.xmlExportPreferences.remapBreakWhitespace is undefined.

Has anyone successfully scripted this particular Export XML option, or is it simply not exposed through the InDesign scripting API?