How to use the @angular/language-service/src/html_info.eventNames function in @angular/language-service

function getAttributeInfosForElement(info, elementName, element) {
        var attributes = [];
        // Add html attributes
        var htmlAttributes = html_info_1.attributeNames(elementName) || [];
        if (htmlAttributes) {
            attributes.push.apply(attributes, tslib_1.__spread(htmlAttributes.map(function (name) { return ({ name: name, fromHtml: true }); })));
        }
        // Add html properties
        var htmlProperties = html_info_1.propertyNames(elementName);
        if (htmlProperties) {
            attributes.push.apply(attributes, tslib_1.__spread(htmlProperties.map(function (name) { return ({ name: name, input: true }); })));
        }
        // Add html events
        var htmlEvents = html_info_1.eventNames(elementName);
        if (htmlEvents) {
            attributes.push.apply(attributes, tslib_1.__spread(htmlEvents.map(function (name) { return ({ name: name, output: true }); })));
        }
        var _a = utils_1.getSelectors(info), selectors = _a.selectors, selectorMap = _a.map;
        if (selectors && selectors.length) {
            // All the attributes that are selectable should be shown.
            var applicableSelectors = selectors.filter(function (selector) { return !selector.element || selector.element == elementName; });
            var selectorAndAttributeNames = applicableSelectors.map(function (selector) { return ({ selector: selector, attrs: selector.attrs.filter(function (a) { return !!a; }) }); });
            var attrs_1 = utils_1.flatten(selectorAndAttributeNames.map(function (selectorAndAttr) {
                var directive = selectorMap.get(selectorAndAttr.selector);
                var result = selectorAndAttr.attrs.map(function (name) { return ({ name: name, input: name in directive.inputs, output: name in directive.outputs }); });
                return result;
            }));
            // Add template attribute if a directive contains a template reference
            selectorAndAttributeNames.forEach(function (selectorAndAttr) {
                var selector = selectorAndAttr.selector;