Calcul des frais de livraisons

Solver/Product/ProductSolver.php

         if ($product->getTitle()) {
             $endOfTitle = $product->getTitle();
         } else {
-            $endOfTitle = $this->getQuantityInherited($product).' '.$this->getUnitInherited($product)->getWordingShort();
+            $endOfTitle = $this->getQuantityInherited($product) . ' ' . $this->getUnitInherited($product)->getWordingShort();
         }
-        return $product->getProductFamily()->getTitle(). ' - '. $endOfTitle;
+        return $product->getProductFamily()->getTitle() . ' - ' . $endOfTitle;
     }
 
     public function getQuantityInherited(ProductInterface $product)
     {
         if ($product->getQuantity()) {
             return $product->getQuantity();
-        } else if($product->getProductFamily()->getQuantity()){
+        } else if ($product->getProductFamily()->getQuantity()) {
             return $product->getProductFamily()->getQuantity();
-        }else{
+        } else {
             return 1;
         }
     }
 
         return null;
     }
+
+    public function getWeightInherited(ProductInterface $product): ? float
+    {
+        if ($product->getWeight()) {
+            return $product->getWeight();
+        }
+        return $product->getProductFamily()->getWeight();
+    }
 }