More info: http://richtabor.com/rejections/

tgmpa-plugin-example.php

<?php
// Include a plugin from the WordPress Repository:
array(
  'name'      => esc_html__( 'WooCommerce', 'text-domain' ),
  'slug'      => 'woocommerce',
  'required'  => false,
),

// Include a plugin bundled within a WordPress theme:
array(
  'name'      => esc_html__( 'Example Plugin', 'text-domain' ),
  'slug'      => 'example-plugin',
  'source'    => get_template_directory() . '/inc/plugins/example-plugin.zip',
  'required'  => false,
),