public UpdateManagerInstall::submitForm(array &$form

_update_requirement_check($project, $type) Fills in the requirements array. This

public UpdateProcessor::claimQueueItem()

Install, update, and uninstall functions for the Update Manager module. File core/modules/update/update.install

template_preprocess_update_last_check(&$variables) Prepares variables for last time update data was checked

public UpdateFetcherInterface::fetchProjectData(array

public UpdateProcessor::numberOfQueueItems()

public UpdateProcessor::deleteQueueItem($item)

The module handler. Type:

protected UpdateKernel::shutdownSession(Request $request)