* Inspects the headers object of the given JS object and constructs a
* {@link Map} of its keys and values.
*/
private static Map<String, HeaderValue> createHeadersMap(DynamicJso data) {
DynamicJso headers = data.get("headers");
JsArrayString keys = headers.keys();
Map<String, HeaderValue> headersMap = Maps.newHashMapWithExpectedSize(keys.length());
for (int i = 0; i < keys.length(); i++) {
String key = keys.get(i);
String value = "";