[Zope] Get the text, not the result, from external_validator field

Hi All, For development purposes I am writing myself an overview of all my Fomulator Forms. In this overview I'm trying to print the text, not the result, of the external_validator field of a specific fomulator field. Does anyone know how to get the text of that field? I started like this and tried everything: "container['the_form'].get_field('the_field') --- how to get the external validator text ---" Greetings Ralph vd Houdt