pub fn get_root(&self) -> Result<String, PluginError> {
        let root = self
            .plugins
            .control_actions
            .settings_actions
            .set_app_root
            .run((), self.plugins.get_plugin_data())?
            .unwrap_or_else(|| self.root.to_string());
        Ok(root)
    }
Gets the HTML ID of the `<div>` at which to insert Perseus.
packages/perseus/src/init.rs