Umbraco Helper Extentions for getting nodes by property value, attribute value and by document type alias

Umbraco Helper Extentions

public static class UmbracoHelperExtensions
    {
        public static IEnumerable<IPublishedContent> TypedContentByPropertyValue(this UmbracoHelper helper, string propertyName, string value, string documentTypeAlias = "")
        {
            if (string.IsNullOrEmpty(documentTypeAlias))
                documentTypeAlias = "*";

            // format: var all = Umbraco.TypedContentAtXPath("//jobListing[englishUrlName = 'test']");
            return helper.TypedContentAtXPath($"//{documentTypeAlias}[{propertyName} = '{value}']");
        }

        public static IEnumerable<IPublishedContent> TypedContentByAttributeValue(this UmbracoHelper helper, string attributeName, string value, string documentTypeAlias = "")
        {
            if (string.IsNullOrEmpty(documentTypeAlias))
                documentTypeAlias = "*";

            // format: var all = Umbraco.TypedContentAtXPath("//jobListing[@urlName = 'online-support']");
            return helper.TypedContentAtXPath($"//{documentTypeAlias}[@{attributeName} = '{value}']");
        }

        public static IEnumerable<IPublishedContent> TypedContentByContentType(this UmbracoHelper helper, string contentTypeAlias)
        {
            // format: var all = Umbraco.TypedContentAtXPath("//jobListing"); where "jobListing" is the document/content type alias
            return helper.TypedContentAtXPath($"//{contentTypeAlias}");
        }

    }