code: public Pager<Namespace> findNamespaces(String query, int itemsPerPage) throws GitLabApiException {
          GitLabApiForm formData = new GitLabApiForm().withParam("search", query, true);
          return (new Pager<Namespace>(this, Namespace.class, itemsPerPage, formData.asMap(), "namespaces"));
      }
docs: Get a Pager of all namespaces that match a string in their name or path.
  
  <pre><code>GitLab Endpoint: GET /namespaces?search=:query</code></pre>
  
  @param query the search string
  @param itemsPerPage the number of Project instances that will be fetched per page
  @return a Pager of Namespace instances with the matching namespaces
  @throws GitLabApiException if any exception occurs