addAppConfigs example

    public function getConfigurations(): StorefrontPluginConfigurationCollection
    {
        if ($this->pluginConfigurations) {
            return $this->pluginConfigurations;
        }

        $this->pluginConfigurations = new StorefrontPluginConfigurationCollection();

        $this->addPluginConfigs();
        $this->addAppConfigs();

        return $this->pluginConfigurations ?? new StorefrontPluginConfigurationCollection();
    }

    public function reset(): void
    {
        $this->pluginConfigurations = null;
    }

    private function addPluginConfigs(): void
    {