code: public Pager<Group> getSubGroups(Object groupIdOrPath, int itemsPerPage) throws GitLabApiException {
          return (new Pager<Group>(this, Group.class, itemsPerPage, null, "groups", getGroupIdOrPath(groupIdOrPath), "subgroups"));
      }
docs: Get a Pager of visible direct subgroups in this group.
  
  <pre><code>GitLab Endpoint: GET /groups/:id/subgroups</code></pre>
  
  @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path, required
  @param itemsPerPage the number of Group instances that will be fetched per page
  @return a Pager containing matching Group instances
  @throws GitLabApiException if any exception occurs
  @since GitLab 10.3.0