TCA for Class B

<?php
if (!defined ('TYPO3_MODE')) {
    die ('Access denied.');
}

$tmp_myext_columns = array(

    'lockable' => array(
        'exclude' => 0,
        'label' => 'LLL:EXT:myext/Resources/Private/Language/locallang_db.xml:tx_myext_domain_model_utility.lockable',
        'config' => array(
            'type' => 'check',
            'default' => 0
        ),
    ),
    'quantity' => array(
        'exclude' => 0,
        'label' => 'LLL:EXT:myext/Resources/Private/Language/locallang_db.xml:tx_myext_domain_model_utility.quantity',
        'config' => array(
            'type' => 'input',
            'size' => 4,
            'eval' => 'int',
                        'default' => 0
        ),
    ),
        'originalUtility' => array(
            'exclude' => 0,
            'label' => 'LLL:EXT:myext/Resources/Private/Language/locallang_db.xml:tx_myext_domain_model_utility.originalUtility',
            'config' => array(
                'type' => 'inline',
                'foreign_table' => 'tx_myext_domain_model_space',
                                'minitems'      => 0,
                'maxitems'      => 1,
                'appearance' => array(
                    'collapseAll' => 0,
                    'levelLinksPosition' => 'top',
                    'showSynchronizationLink' => 1,
                    'showPossibleLocalizationRecords' => 1,
                    'showAllLocalizationLink' => 1
                ),
            ),
        ),
);

$tmp_myext_columns['form'] = array(
    'config' => array(
        'type' => 'passthrough',
    )
);

t3lib_extMgm::addTCAcolumns('tx_myext_domain_model_space',$tmp_myext_columns);

$TCA['tx_myext_domain_model_space']['columns'][$TCA['tx_myext_domain_model_space']['ctrl']['type']]['config']['items'][] = array('LLL:EXT:myext/Resources/Private/Language/locallang_db.xml:tx_myext_domain_model_space.tx_extbase_type.tx_myext_Utility','tx_myext_Utility');

$TCA['tx_myext_domain_model_space']['types']['tx_myext_Utility']['showitem'] = $TCA['tx_myext_domain_model_space']['types']['1']['showitem'];
$TCA['tx_myext_domain_model_space']['types']['tx_myext_Utility']['showitem'] .= ',--div--;LLL:EXT:myext/Resources/Private/Language/locallang_db.xml:tx_myext_domain_model_utility,';
$TCA['tx_myext_domain_model_space']['types']['tx_myext_Utility']['showitem'] .= 'lockable, quantity, originalUtility';

## EXTENSION BUILDER DEFAULTS END TOKEN - Everything BEFORE this line is overwritten with the defaults of the extension builder
?>