Entity add custom properties

PHP Code:

 
    protected $returnType = \App\Models\Entity\Image::class;
    protected $afterFind = ['_addExtendProps'];

   private function _addExtendProps(Image $image): Image
    {
        $groups    = \Config\Services::groups();
        $users     = \Config\Services::users();
        // .. code select other Entity
        $image->group  = $group;
        $image->user   = $user;
        $image->syncOriginal();

        return $image;
    } 


If you set the $user or $group properties via the magic $this->var - the attribute is available via $image->toArray()

How to initialize an empty attribute $this ->attributes['user'] = null ? To avoid warning.
Use only in the constructor?

And today there was a question with this: $image ->toRawArray()  return virtual $image->user
This breaks $this->builder()->insertBatch($images->toRawArray()); because $image->user doesn't exist in the table (Object of class App\Models\Entity\User could not be converted to string )

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