Added the missing methods to the MemoryStore test dummy

src/Checkout/Tests/Example/MemoryStore.php

@@ -20,6 +20,7 @@
 use Vanilo\Contracts\Billpayer;
 use Vanilo\Contracts\CheckoutSubject;
 use Vanilo\Contracts\DetailedAmount;
+use Vanilo\Contracts\Dimension;
 
 class MemoryStore implements CheckoutStore
 {
@@ -142,6 +143,46 @@ public function total()
  return 0;
  }
 
+ public function itemsTotal(): float
+ {
+ return 0;
+ }
+
+ public function offsetExists(mixed $offset): bool
+ {
+ return isset($this->customAttributes[$offset]);
+ }
+
+ public function offsetGet(mixed $offset): mixed
+ {
+ return $this->customAttributes[$offset] ?? null;
+ }
+
+ public function offsetSet(mixed $offset, mixed $value): void
+ {
+ $this->customAttributes[$offset] = $value;
+ }
+
+ public function offsetUnset(mixed $offset): void
+ {
+ unset($this->customAttributes[$offset]);
+ }
+
+ public function weight(): float
+ {
+ return 0;
+ }
+
+ public function weightUnit(): string
+ {
+ return 'kg';
+ }
+
+ public function dimension(): ?Dimension
+ {
+ return new \Vanilo\Support\Dto\Dimension(0, 0, 0);
+ }
+
  public function customMethod(): string
  {
  return 'Hey I am a custom method';