HP-1751 tiny (#97)

Author: VadymHrechukha

src/sale/Sale.php

@@ -105,7 +105,7 @@ public function getCloseTime(): ?DateTimeImmutable
         return $this->closeTime;
     }
 
-    public function close(DateTimeImmutable $closeTime): void
+    public function close(DateTimeImmutable $closeTime): self
     {
         if ($this->closeTime !== null) {
             throw new InvariantException('Sale is already closed');
@@ -116,6 +116,8 @@ public function close(DateTimeImmutable $closeTime): void
         }
 
         $this->closeTime = $closeTime;
+
+        return $this;
     }
 
     public function setId($id)

src/sale/SaleInterface.php

@@ -71,7 +71,7 @@ public function getData(): ?array;
      * @throws InvariantException
      * @throws ConstraintException
      */
-    public function close(DateTimeImmutable $closeTime): void;
+    public function close(DateTimeImmutable $closeTime): self;
 
     public function cancelClosing(): void;
 }