<li
                                                        <c:if test="${p == pager.currentPageNumber}">class="page-item active"</c:if>>
                                                    <la:link
                                                            styleClass="page-link"

We are going to enforce that even though `q` is optional, whenever it is provided, **its length doesn't exceed 50 characters**.

### Import `Query` and `Annotated` { #import-query-and-annotated }

To achieve that, first import:

* `Query` from `fastapi`
* `Annotated` from `typing`

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[1,3] *}

/// info

                                <la:message key="labels.dict_protwords_list_link"/>
                            </la:link></li>
                            <li class="breadcrumb-item active"><la:message
                                    key="labels.dict_protwords_link_details"/></li>
                        </ol>
                    </div>
                </div>
            </div>
        </div>

	ETA         time.Duration `json:"eta"`
}

type rebalancePoolStatus struct {
	ID       int               `json:"id"`       // Pool index (zero-based)
	Status   string            `json:"status"`   // Active if rebalance is running, empty otherwise
	Used     float64           `json:"used"`     // Percentage used space
	Progress rebalPoolProgress `json:"progress"` // is empty when rebalance is not running
}

                        </h1>
                    </div>
                    <div class="col-sm-6">
                        <ol class="breadcrumb float-sm-right">
                            <li class="breadcrumb-item active"><la:link href="/admin/crawlinginfo">
                                <la:message key="labels.crawling_info_title"/>
                            </la:link></li>
                        </ol>
                    </div>

                                                <li
                                                        <c:if test="${p == pager.currentPageNumber}">class="page-item active"</c:if>>
                                                    <la:link
                                                            styleClass="page-link"

                                                <li
                                                        <c:if test="${p == pager.currentPageNumber}">class="page-item active"</c:if>>
                                                    <la:link
                                                            styleClass="page-link"

                            </la:link></li>
                            <c:if test="${crudMode == 4}">
                                <li class="breadcrumb-item active"><la:message
                                        key="labels.searchlog_configuration_link_details"/></li>
                            </c:if>
                        </ol>
                    </div>
                </div>

    /**
     * Enumeration of possible witness registration states.
     */
    public enum WitnessRegistrationState {
        /** Registration is in progress */
        REGISTERING,
        /** Registration is active and confirmed */
        REGISTERED,
        /** Unregistration is in progress */
        UNREGISTERING,
        /** Registration has failed */
        FAILED,
        /** Registration has expired due to timeout */

                                <la:message key="labels.dict_mapping_list_link"/>
                            </la:link></li>
                            <li class="breadcrumb-item active"><la:message
                                    key="labels.dict_mapping_link_details"/></li>
                        </ol>
                    </div>
                </div>
            </div>
        </div>