upgrade to filament v4

app/Filament/Resources/Branches/RelationManagers/ExpenseRelationManager.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Filament\Resources\BranchResource\RelationManagers;
+
+use App\Filament\Resources\ExpenseResource;
+use Filament\Forms\Form;
+use Filament\Resources\RelationManagers\RelationManager;
+use Filament\Tables\Actions\CreateAction;
+use Filament\Tables\Table;
+
+class ExpenseRelationManager extends RelationManager
+{
+    protected static string $relationship = 'expenses';
+
+    public function form(Form $form): Form
+    {
+        return $form
+            ->schema(ExpenseResource::getExpenseFormFields());
+    }
+
+    public function table(Table $table): Table
+    {
+        return $table
+            ->recordTitleAttribute('branch_id')
+            ->columns(ExpenseResource::getTableColumns())
+            ->headerActions([
+                CreateAction::make()
+                    ->mutateFormDataUsing(
+                        fn (array $data): array => app(ExpenseResource\Pages\CreateExpense::class)
+                            ->getFormDataMutation($data)
+                    ),
+            ]);
+    }
+}