protected function defineAttributes()
{
return ['name' => [AttributeType::Name, 'required' => true], 'handle' => [AttributeType::Handle, 'required' => true], 'maxBlocks' => [AttributeType::Number, 'default' => 0], 'childBlocks' => AttributeType::Mixed, 'topLevel' => [AttributeType::Bool, 'default' => true], 'sortOrder' => AttributeType::SortOrder];
}