TYPO3 Core

Hi All I have found a problem in TYPO3 CMS 8. I create a folder structure in TYPO3 CMS 7.x flexform

<settings.folder>
<TCEforms>
<label>test</label>
<onChange>reload</onChange>
<config>
<type>group</type>
<internal_type>folder</internal_type>
<minitems>1</minitems>
<maxitems>1</maxitems>
<size>1</size>
<wizards>
<uproc>
<type>userFunc</type>
<userFunc>Test\Site\Check\SampleTest->customEvent</userFunc>
</uproc>
</wizards>
</config>
</TCEforms>
</settings.folder>

in my function after print_r($PA) I got this aa9.jpg. but in TYPO3 CMS 8 item index is blank this is the image bbb.jpg. so my onchange event is not worked anymore. How Can I get the Wizard Items in $PA in TYPO3 CMS 8?