id; } public function getDepartment() { return $this->department ?? new NullOrgDepartment(); } public function setDepartment($department) : void { $this->department = $department; } public function getResponsible() { return $this->responsible; } public function setResponsible($responsible) : void { $this->responsible = $responsible; } public function getDeputy() { return $this->deputy; } public function setDeputy($deputy) : void { $this->deputy = $deputy; } }