Add product_exists field to shopify Order.LineItem

Author: metin-mustafa

src/main/java/com/storakle/shopify/domain/JsonConstants.java

@@ -40,6 +40,7 @@ public final class JsonConstants
     // Product
     public static final String PRODUCTS = "products";
 
+    public static final String PRODUCT_EXISTS = "product_exists";
     public static final String VARIANT_ID = "variant_id";
     public static final String HANDLE = "handle";
     public static final String IMAGE = "image";

src/main/java/com/storakle/shopify/domain/LineItem.java

@@ -14,6 +14,9 @@ public class LineItem
     @JsonProperty(value = JsonConstants.PRODUCT_ID)
     private long productId;
 
+    @JsonProperty(value = JsonConstants.PRODUCT_EXISTS)
+    private boolean productExists;
+
     @JsonProperty(value = JsonConstants.VARIANT_ID)
     private long variantId;