/\\\\\\(?=[$.|*+(){^])/g,
        () => ESCAPE
    ],

    [
        // '\\\\' -> '\\'
        /\\\\/g,
        () => ESCAPE
    ],

    [
        // > The range notation, e.g. [a-zA-Z],
        // > can be used to match one of the characters in a range.

        // `\` is escaped by step 3
        /(\\)?\[([^\]/]*?)(\\*)($|\])/g,

{return i({valid:!1,message:"Connection failed with status: "+a.statusText},f),!1},success:function(a){i(a,f)}})};a.formUtils.addAsyncValidator({name:"server",validatorFunction:function(a,b,c,d,e,g){var h=c.valAttr("url")||d.backendUrl||document.location.href;g.addClass("validating-server-side"),c.addClass("validating-server-side"),f(h,c,b,d,function(b){g.removeClass("validating-server-side"),c.removeClass("validating-server-side"),b.message&&c.attr(d.validationErrorMsgAttribute,b.message),a(b.v...