function retrieveMultipleRecords(entityName, query) {
    var req = new XMLHttpRequest();
    req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v9.0/" + entityName + query, true);
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("Prefer", "odata.include-annotations=*");

    req.onreadystatechange = function () {
        if (this.readyState === 4) {
            req.onreadystatechange = null;
            if (this.status === 200) {
                var results = JSON.parse(this.response);
                console.log(results);
                // Example of handling the retrieved data
                var resultArray = results.value;
                resultArray.forEach(function (record) {
                    console.log("Name: " + record.name + ", Account Number: " + record.accountnumber);
                });
            } else {
                console.error(this.statusText);
            }
        }
    };
    req.send();
}