App\Providers\ThemeServiceProvider::boot PHP Method

    public function boot()
    {
        // TODO: move code to valid location!!!
        // TODO: check permission!!
        $this->registerInterceptForThemePreview();
        $this->registerBlankTheme();
        $this->registerThemeListUIObject();
        $this->registerMobileResolver();
        $this->setThemeHandlerForTheme();
    }