$this->addFormItem([
'id' => 'name',
// specify the parent_id if you want to add this field into
// a parent div. It can also be null.
'parent_id' => 'right-col',
'type' => 'text',
'validation_rules' => ['name' => 'required|unique:brands,name,{{$id}}'],
'label' => __('Name'),
'name' => 'name'
]);