{% set items = items|default([
  {
    url: '#',
    text: 'Course Details'
  },
  {
    url: '#',
    text: 'The Instructors'
  },
  {
    url: '#',
    text: 'Related Courses'
  }
])%}

{% include '@union/_page-nav.twig' with {
  heading: 'Explore',
  items: items
} only %}