$uiReader
is \Magento\Framework\View\Element\UiComponent\Config\Reader
$fileCollector
is \Magento\Framework\View\Element\UiComponent\Config\FileCollector\AggregatedFileCollector
$searchPattern
is etc/definition.xml
$uiReader
is \Magento\Framework\View\Element\UiComponent\Config\Reader
$fileCollector
is \Magento\Framework\View\Element\UiComponent\Config\FileCollector\AggregatedFileCollector
$searchPattern
is etc/definition.xml