invoice pdf design

app/Classes/Modules/Transactions/DataTransferObjects/TransactionDetailObject.php

@@ -6,16 +6,16 @@ use App\Classes\General\Interfaces\DataTransferObject;
 
 class TransactionDetailObject implements DataTransferObject
 {
-    /** @var string */
+    /** @var string|null */
     private $code;
 
-    /** @var string */
+    /** @var string|null */
     private $name;
 
-    /** @var int */
+    /** @var int|null */
     private $quantity;
 
-    /** @var float */
+    /** @var float|null */
     private $price;
 
     /**
@@ -25,7 +25,7 @@ class TransactionDetailObject implements DataTransferObject
      * @param int $quantity
      * @param float $price
      */
-    public function __construct(string $code, string $name, int $quantity, float $price)
+    public function __construct(?string $code, ?string $name , ?int $quantity, ?float $price)
     {
         $this->code = $code;
         $this->name = $name;
@@ -36,7 +36,7 @@ class TransactionDetailObject implements DataTransferObject
     /**
      * @return string
      */
-    public function getCode(): string
+    public function getCode(): ?string
     {
         return $this->code;
     }
@@ -44,7 +44,7 @@ class TransactionDetailObject implements DataTransferObject
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
@@ -52,7 +52,7 @@ class TransactionDetailObject implements DataTransferObject
     /**
      * @return int
      */
-    public function getQuantity(): int
+    public function getQuantity(): ?int
     {
         return $this->quantity;
     }
@@ -60,7 +60,7 @@ class TransactionDetailObject implements DataTransferObject
     /**
      * @return float
      */
-    public function getPrice(): float
+    public function getPrice(): ?float
     {
         return $this->price;
     }