def METHOD_NAME(self):
    fields_string = api.portal.get_registry_record(
        'plone.request_access_form_accepted_fields',
        default='',
    )
    fields = [
        field.strip()
        for field in fields_string.splitlines()
        if len(field.strip()) > 0
    ]
    if len(fields) == 0:
        return self.default_fields
    return fields