code: public Stream<Variable> getVariablesStream(Object groupIdOrPath) throws GitLabApiException {
          return (getVariables(groupIdOrPath, getDefaultPerPage()).stream());
      }
docs: Get a Stream 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
  @return a Stream of variables belonging to the specified group
  @throws GitLabApiException if any exception occurs