this makes possible adding extra attributes to models

app/Imports/Sales/Customers.php

@@ -3,14 +3,19 @@
 namespace App\Imports\Sales;
 
 use App\Abstracts\Import;
-use App\Models\Common\Contact as Model;
+use App\Events\Common\ModelCreated;
 use App\Http\Requests\Common\Contact as Request;
+use App\Models\Common\Contact as Model;
 
 class Customers extends Import
 {
     public function model(array $row)
     {
-        return new Model($row);
+        $model = new Model($row);
+
+        event(new ModelCreated($model, $row));
+
+        return $model;
     }
 
     public function map($row): array

app/Imports/Sales/Revenues.php

@@ -3,6 +3,7 @@
 namespace App\Imports\Sales;
 
 use App\Abstracts\Import;
+use App\Events\Common\ModelCreated;
 use App\Http\Requests\Banking\Transaction as Request;
 use App\Models\Banking\Transaction as Model;
 
@@ -10,7 +11,11 @@ class Revenues extends Import
 {
     public function model(array $row)
     {
-        return new Model($row);
+        $model = new Model($row);
+
+        event(new ModelCreated($model, $row));
+
+        return $model;
     }
 
     public function map($row): array

app/Imports/Sales/Sheets/InvoiceItems.php

@@ -3,6 +3,7 @@
 namespace App\Imports\Sales\Sheets;
 
 use App\Abstracts\Import;
+use App\Events\Common\ModelCreated;
 use App\Http\Requests\Document\DocumentItem as Request;
 use App\Models\Document\Document;
 use App\Models\Document\DocumentItem as Model;
@@ -11,7 +12,11 @@ class InvoiceItems extends Import
 {
     public function model(array $row)
     {
-        return new Model($row);
+        $model = new Model($row);
+
+        event(new ModelCreated($model, $row));
+
+        return $model;
     }
 
     public function map($row): array

app/Imports/Sales/Sheets/Invoices.php

@@ -3,6 +3,7 @@
 namespace App\Imports\Sales\Sheets;
 
 use App\Abstracts\Import;
+use App\Events\Common\ModelCreated;
 use App\Http\Requests\Document\Document as Request;
 use App\Models\Document\Document as Model;
 use Illuminate\Support\Str;
@@ -11,7 +12,11 @@ class Invoices extends Import
 {
     public function model(array $row)
     {
-        return new Model($row);
+        $model = new Model($row);
+
+        event(new ModelCreated($model, $row));
+
+        return $model;
     }
 
     public function map($row): array