[Product-Developers] dexterity NamedBlobFile: file size limit?

[Kees Hink]

Is there a way to set a limit on the allowed file size NamedBlobFile fields in
dexterity content types?

The list of field properties on
http://plone.org/products/dexterity/documentation/manual/developer-manual/reference/fields
doesn't list anything.

I've also browsed through plone.formwidget.namedfile.widget.NamedFileWidget and
z3c.form.browser.FileWidget, but found nothing there.

Is this something that currently can't be done?

Kees