Custom action in relation manager

public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('item.name'),
                Tables\Columns\TextColumn::make('qty')
                    ->label('Quantity'),
            ])
            ->filters([
                //
            ])
            ->headerActions([
                // Tables\Actions\CreateAction::make(),
            ])
            ->actions([
                // Tables\Actions\EditAction::make(),
                // Tables\Actions\DeleteAction::make(),
                Tables\Actions\Action::make('refundItem')
                    ->label('Refund Item')
                    ->action(function($record) {
                        return "refundItem($record->id)";
                    })
            ])
            ->bulkActions([
                // Tables\Actions\DeleteBulkAction::make(),
            ]);
    }

    public function refundItem($selectionId)
    {
        dd($selectionId);
    }