How to use the @angular/language-service/src/utils.uniqueByName function in @angular/language-service

function interpolationCompletions(info, position) {
        // Look for an interpolation in at the position.
        var templatePath = utils_1.findTemplateAstAt(info.templateAst, position);
        var mostSpecific = templatePath.tail;
        if (mostSpecific) {
            var visitor = new ExpressionVisitor(info, position, undefined, function () { return language_services_1.getExpressionScope(utils_1.diagnosticInfoFromTemplateInfo(info), templatePath, false); });
            mostSpecific.visit(visitor, null);
            return utils_1.uniqueByName(visitor.result);
        }
    }
    // There is a special case of HTML where text that contains a unclosed tag is treated as

function elementCompletions(info, path) {
        var htmlNames = html_info_1.elementNames().filter(function (name) { return !(name in hiddenHtmlElements); });
        // Collect the elements referenced by the selectors
        var directiveElements = utils_1.getSelectors(info)
            .selectors.map(function (selector) { return selector.element; })
            .filter(function (name) { return !!name; });
        var components = directiveElements.map(function (name) { return ({ kind: 'component', name: name, sort: name }); });
        var htmlElements = htmlNames.map(function (name) { return ({ kind: 'element', name: name, sort: name }); });
        // Return components and html elements
        return utils_1.uniqueByName(htmlElements.concat(components));
    }
    function entityCompletions(value, position) {