Neos\Neos\Controller\Module\Management\WorkspacesController::publishWorkspaceAction PHP Method

    public function publishWorkspaceAction(Workspace $workspace)
    {
        if (($targetWorkspace = $workspace->getBaseWorkspace()) === null) {
            $targetWorkspace = $this->workspaceRepository->findOneByName('live');
        }
        $this->publishingService->publishNodes($this->publishingService->getUnpublishedNodes($workspace), $targetWorkspace);
        $this->addFlashMessage($this->translator->translateById('workspaces.allChangesInWorkspaceHaveBeenPublished', [htmlspecialchars($workspace->getTitle()), htmlspecialchars($targetWorkspace->getTitle())], null, null, 'Modules', 'Neos.Neos'));
        $this->redirect('index');
    }