ext_tables.php

<?php

defined('TYPO3_MODE') or die();



\TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin(
    'mailmanext',
    'Pil',
    'Mailman Mailinglists',
    'EXT:mailmanext/ext_icon.png'
);

$GLOBALS['TCA']['tt_content']['types']['list']['subtypes_excludelist']['mailmanext_pil'] = 'select_key,pages,recursive';

$GLOBALS['TCA']['tt_content']['types']['list']['subtypes_addlist']['mailmanext_pil'] = 'pi_flexform';



\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPiFlexFormValue(
	'mailmanext_pil',
	'FILE:EXT:mailmanext/Configuration/FlexForms/pil.xml'
);


\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPageTSConfig('<INCLUDE_TYPOSCRIPT: source="FILE:EXT:mailmanext/Configuration/TSconfig/ContentElementWizard.txt">');

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
  'mailmanext',
  'Configuration/TypoScript',
  'Mailman Extension'
);

$iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\IconRegistry::class);
$iconRegistry->registerIcon(
    'ext_icon',
    \TYPO3\CMS\Core\Imaging\IconProvider\BitmapIconProvider::class,
    ['source' => 'EXT:mailmanext/ext_icon.png']
);