ToggleButton state return string

Inside the protected function:

handleRecordUpdate(Model $record, array $data): Model
 {
 dd($data);

handleRecordUpdate(Model $record, array $data): Model
 {
 dd($data);

handleRecordUpdate(Model $record, array $data): Model
 {
 dd($data);

handleRecordUpdate(Model $record, array $data): Model
 {
 dd($data);

php

returns "1" or "0".

When it should be null, 0 or 1.

ToggleButtons::make('test')
    ->label('Test')
    ->inline()
    ->boolean(),

ToggleButtons::make('test')
    ->label('Test')
    ->inline()
    ->boolean(),

ToggleButtons::make('test')
    ->label('Test')
    ->inline()
    ->boolean(),

ToggleButtons::make('test')
    ->label('Test')
    ->inline()
    ->boolean(),