Author: Chad Sikorra (Chad.Sikorra@gmail.com)
Inheritance: extends Flags, use trait FlagsSddlTrait
 /**
  * @param bool $present
  * @param string $identifier
  * @return $this
  */
 protected function toggleAclPresent($present, $identifier)
 {
     if ($present) {
         $this->controlFlags->add(ControlFlags::FLAG[$identifier . 'ACL_PRESENT']);
     } else {
         $this->controlFlags->remove(ControlFlags::FLAG[$identifier . 'ACL_PRESENT']);
     }
     return $this;
 }