Is it possible to make input text for an Editable Text widget overwrite on a per character basis?

Basically, I want the “Insert” key functionality that is available in most text editors.

For example, If the Editable Text widget’s current text is:

Example Text Here

And the cursor is between the [ e] and [ x] in [ Text], then if the user types a [ G] the resulting text should be:

Example TeGt Here

Is this possible with the Editable Text widget?