Craft\AmForms_SubmissionsService::getConfirmationEmailBody PHP Method

    public function getConfirmationEmailBody(AmForms_SubmissionModel $submission)
    {
        // Get form if not already set
        $submission->getForm();
        $form = $submission->form;
        // Get email body
        $variables = array('tabs' => $form->getFieldLayout()->getTabs(), 'form' => $form, 'submission' => $submission);
        return craft()->amForms->renderDisplayTemplate('confirmation', $form->confirmationTemplate, $variables);
    }