///

For example, this custom validator checks that the item ID starts with `isbn-` for an <abbr title="ISBN means International Standard Book Number">ISBN</abbr> book number or with `imdb-` for an <abbr title="IMDB (Internet Movie Database) is a website with information about movies">IMDB</abbr> movie URL ID:

                                        <la:link href="/admin/dict"
                                                 styleClass="btn btn-default btn-xs">
                                            <i class="fa fa-book" aria-hidden="true"></i>
                                            <la:message key="labels.dict_list_link"/>
                                        </la:link>

                                        <la:link href="/admin/dict"
                                                 styleClass="btn btn-default btn-xs">
                                            <i class="fa fa-book" aria-hidden="true"></i>
                                            <la:message key="labels.dict_list_link"/>
                                        </la:link>

                                        <la:link href="/admin/dict"
                                                 styleClass="btn btn-default btn-xs">
                                            <i class="fa fa-book" aria-hidden="true"></i>
                                            <la:message key="labels.dict_list_link"/>
                                        </la:link>

                                        <la:link href="/admin/dict"
                                                 styleClass="btn btn-default btn-xs">
                                            <i class="fa fa-book" aria-hidden="true"></i>
                                            <la:message key="labels.dict_list_link"/>
                                        </la:link>

                                <div class="btn-group">
                                    <la:link href="/admin/dict" styleClass="btn btn-default btn-xs">
                                        <i class="fa fa-book" aria-hidden="true"></i>
                                        <la:message key="labels.dict_list_link"/>
                                    </la:link>
                                    <la:link href="list/1?dictId=${f:u(dictId)}"

                                        <la:link href="/admin/dict"
                                                 styleClass="btn btn-default btn-xs">
                                            <i class="fa fa-book" aria-hidden="true"></i>
                                            <la:message key="labels.dict_list_link"/>
                                        </la:link>

                                <div class="btn-group">
                                    <la:link href="/admin/dict" styleClass="btn btn-default btn-xs">
                                        <i class="fa fa-book" aria-hidden="true"></i>
                                        <la:message key="labels.dict_list_link"/>
                                    </la:link>
                                    <la:link href="list/1?dictId=${f:u(dictId)}"

old:before{content:"\f032"}.fa-bolt:before{content:"\f0e7"}.fa-bomb:before{content:"\f1e2"}.fa-bone:before{content:"\f5d7"}.fa-bong:before{content:"\f55c"}.fa-book:before{content:"\f02d"}.fa-book-dead:before{content:"\f6b7"}.fa-book-medical:before{content:"\f7e6"}.fa-book-open:before{content:"\f518"}.fa-book-reader:before{content:"\f5da"}.fa-bookmark:before{content:"\f02e"}.fa-bootstrap:before{content:"\f836"}.fa-border-all:before{content:"\f84c"}.fa-border-none:before{content:"\f850"}.fa-border...

had plenty of time as she went down to look about her and to
wonder what was going to happen next.  First, she tried to look
down and make out what she was coming to, but it was too dark to
see anything; then she looked at the sides of the well, and
noticed that they were filled with cupboards and book-shelves;
here and there she saw maps and pictures hung upon pegs.  She
took down a jar from one of the shelves as she passed; it was