upgrade to filament v4

app/Filament/Resources/Clients/RelationManagers/TransmittalsRelationManager.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Filament\Resources\ClientResource\RelationManagers;
+
+use App\Filament\Resources\TransmittalResource;
+use Filament\Forms\Form;
+use Filament\Resources\RelationManagers\RelationManager;
+use Filament\Tables;
+use Filament\Tables\Table;
+use Illuminate\Database\Eloquent\Model;
+
+class TransmittalsRelationManager extends RelationManager
+{
+    protected static string $relationship = 'transmittals';
+
+    public static function canViewForRecord(Model $ownerRecord, string $pageClass): bool
+    {
+        return auth()->user()->can('update_transmittal');
+    }
+
+    public function form(Form $form): Form
+    {
+        return TransmittalResource::form($form)
+            ->fill(
+                ['client_id' => $this->getOwnerRecord()->id]
+            );
+    }
+
+    public function table(Table $table): Table
+    {
+        return TransmittalResource::table($table)->headerActions([
+            Tables\Actions\Action::make('New Transmittal')->action('openCreateForm'),
+        ]);
+    }
+
+    public function openCreateForm()
+    {
+        return redirect()->route('filament.admin.resources.transmittals.create');
+    }
+}