[2587] Module - use this.nuxt.plugin give error (how use new hook system correct)

I wan't to use module for WP API request in whole app and to easily copy on other projects. Right now I get:

(node:7476) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: this.nuxt.plugin is not a function

Content of module file:

const { resolve } = require('path');
const defaults = {};

module.exports = async function wp (moduleOptions) {
  let options = Object.assign({}, defaults, this.options['wp'], moduleOptions);

  // this.addPlugin({
  //   src: resolve(__dirname, './templates/wp.plugin.js'),
  //   fileName: 'wp.plugin.js',
  //   options
  // });

    this.nuxt.plugin('generate', async generator => {
      console.log(generator);
      // This will be called when a Nuxt generate starts
    }).then(function () {
        console.log("Promise Resolved");
    }).catch(function () {
        console.log("Promise Rejected");
    });
};

module.exports.meta = require('../package.json');

Documentation: https://nuxtjs.org/guide/modules/#run-tasks-on-specific-hooks Where is error? No good example for use this.next

Found: We have a new internal hook system now, some modules can be broken with 1.0 if they were relying on this.nuxt.plugin(), instead, they will have to use this.hook(), see module hooks documentation.

This isn't show on documentation. Can somebody link where hook is show and work correct in last release?