/
* @ORM\OneToMany(targetEntity="App\Entity\BillingOrder\BillingOrder", mappedBy="task", cascade={"persist", "remove"})
*/
private $billingOrders;
/
* @ORM\ManyToOne(targetEntity=Task::class, inversedBy="billingOrders", cascade={"persist"})
* @ORM\JoinColumn(name="task_id", referencedColumnName="id", nullable=true, onDelete="CASCADE")
*/
private $task;