title: gitlab api: get all the project of a groups (with sub groups)
body: <p>I want to use gitlab apis to get all the projects and sub-projects of the group, that is the info I get when I go to the group's page</p>
  
  <p>I noticed that gitlab's ui uses </p>
  
  <pre><code>https://gitlab.com/groups/&lt;group_name&gt;/&lt;subgroup_name&gt;/-/children.json
  </code></pre>
  
  <p>To get the projects and subgroups of a group.</p>
  
  <p>I wonder if there's something like that or I have to build it using the <code>groups/xxx/subgroups</code> and <code>grops/xxx/projects</code> endpoints recursively.</p>