[10.x] Add getters for owner instances to objects

src/Invoice.php

@@ -324,6 +324,16 @@ public function downloadAs($filename, array $data)
         ]);
     }
 
+    /**
+     * Get the Stripe model instance.
+     *
+     * @return \Illuminate\Database\Eloquent\Model
+     */
+    public function owner()
+    {
+        return $this->owner;
+    }
+
     /**
      * Get the Stripe invoice instance.
      *

src/InvoiceItem.php

@@ -112,6 +112,16 @@ protected function formatAmount($amount)
         return Cashier::formatAmount($amount, $this->item->currency);
     }
 
+    /**
+     * Get the Stripe model instance.
+     *
+     * @return \Illuminate\Database\Eloquent\Model
+     */
+    public function owner()
+    {
+        return $this->owner;
+    }
+
     /**
      * Get the underlying Stripe invoice item.
      *

src/PaymentMethod.php

@@ -50,6 +50,16 @@ public function delete()
         return $this->owner->removePaymentMethod($this->paymentMethod);
     }
 
+    /**
+     * Get the Stripe model instance.
+     *
+     * @return \Illuminate\Database\Eloquent\Model
+     */
+    public function owner()
+    {
+        return $this->owner;
+    }
+
     /**
      * Get the Stripe PaymentMethod instance.
      *