RainLab\Pages\Classes\Page::initCmsComponents PHP Method

    public function initCmsComponents($cmsController)
    {
        $snippetComponents = Snippet::listPageComponents($this->getFileName(), $this->theme, $this->markup . $this->code);
        $componentManager = ComponentManager::instance();
        foreach ($snippetComponents as $componentInfo) {
            // Register components for snippet-based components
            // if they're not defined yet. This is required because
            // not all snippet components are registered as components,
            // but it's safe to register them in render-time.
            if (!$componentManager->hasComponent($componentInfo['class'])) {
                $componentManager->registerComponent($componentInfo['class'], $componentInfo['alias']);
            }
            $cmsController->addComponent($componentInfo['class'], $componentInfo['alias'], $componentInfo['properties']);
        }
    }