How to use the @mapbox/fusspot.arrayOf function in @mapbox/fusspot

host: v.string,
        hot: v.boolean,
        htmlSource: v.oneOfType(validatePromise, v.string, v.func),
        jsEntry: validateAbsolutePaths,
        liveReload: v.boolean,
        environmentVariables: v.plainObject,
        modernBrowserTest: v.string,
        outputDirectory: validateAbsolutePaths,
        polyfill: v.boolean,
        port: v.number,
        postcssPlugins: v.arrayOf(v.func),
        publicAssetsPath: v.string,
        publicDirectory: v.string,
        siteBasePath: validateBasePath,
        stats: v.string,
        vendorModules: v.arrayOf(v.string),
        webpackConfigTransform: v.func,
        webpackLoaders: v.arrayOf(v.plainObject),
        webpackPlugins: v.arrayOf(v.any)
      })
    )(rawConfig);
  } catch (error) {
    error.message = `Invalid Underreact configuration. ${error.message}`;
    throw error;
  }
}