drupal_implode_tags() and drupal_explode_tags() replaced with Drupal\Component\Utility\Tags class

The utility functions drupal_implode_tags() and drupal_explode_tags() have been replaced with the Drupal\Component\Utility\Tags class.

Drupal 7

$input = 'foo, bar, baz';
$tags = drupal_explode_tags($input);
$string = drupal_implode_tags($tags);

Drupal 8

$input = 'foo, bar, baz';
$tags = Tags::explode($input);
$string = Tags::implode($tags);