def render_invalid_response(self, forms):
        kwargs = forms
        kwargs['forms'] = [
            form_class for form_class in forms.itervalues()
            if isinstance(form_class, BaseForm)
        ]
        kwargs['form_errors'] = True
        return self.form_invalid(kwargs)
Renders a response if forms don't validate.
dataset/ETHPy150Open ofa/connect/open_connect/connect_core/utils/views.py/ProcessMultipleFormsView.render_invalid_response