code: public Pager<Variable> getVariables(Object groupIdOrPath, int itemsPerPage) throws GitLabApiException {
          return (new Pager<Variable>(this, Variable.class, itemsPerPage, null, "groups", getGroupIdOrPath(groupIdOrPath), "variables"));
      }
docs: Get a Pager of variables belonging to the specified group.
  
  <pre><code>GitLab Endpoint: GET /groups/:id/variables</code></pre>
  
  @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
  @param itemsPerPage the number of Variable instances that will be fetched per page
  @return a Pager of variables belonging to the specified group
  @throws GitLabApiException if any exception occurs