Drupal 8 uninstall a module programmatically

Drupal 8 does not allow to enable/disable modules like previous versions.

You have to completely uninstall a module to get rid of it.

You can install the module be:

<?php
  \Drupal::service('module_installer')->install(['admin_toolbar']);?>


You can uninstall the module by:

<?php
  \Drupal::service('module_installer')->uninstall(['admin_toolbar']);?>