materio-base-d7/sites/all/modules/contrib/mail/Mailjet/mailjet.install

<?php
/**
 * @file
 * Functions called while installing, uninstalling or activation of the module.
 */

/**
 * Implements hook_install().
 */
function mailjet_install() {
  variable_set('mailjet_debug', FALSE);
}

/**
 * Implements hook_uninstall().
 */
function mailjet_uninstall() {
  variable_del('mailjet_from');
  variable_del('mailjet_host');
  variable_del('mailjet_on');
  variable_del('mailjet_password');
  variable_del('mailjet_port');
  variable_del('mailjet_protocol');
  variable_del('mailjet_test');
  variable_del('mailjet_test_address');
  variable_del('mailjet_username');
  variable_del('mailjet_allowhtml');
  variable_del('mailjet_debug');
}

/**
 * Implements hook_disable().
 */
function mailjet_disable() {
  variable_set('mailjet_on', FALSE);
  variable_set('mail_system', array('default-system' => 'DefaultMailSystem'));
}

/**
 * Implements hook_update().
 */
function mailjet_update_7000() {
  if (variable_get('mailjet_on', FALSE)) {
    variable_set('mail_system', array('default-system' => 'MailjetSmtpMailSystem'));
  }
}