{Object} [options.parameters] Any extra query parameters to append to the URL.
{String} [options.callbackParameterName='callback'] The callback parameter name that the server expects.
{Proxy} [options.proxy] A proxy to use for the request. This object is expected to have a getURL function which returns the proxied URL, if needed.
{Object} [options.parameters] Any extra query parameters to append to the URL. {String} [options.callbackParameterName='callback'] The callback parameter name that the server expects. {Proxy} [options.proxy] A proxy to use for the request. This object is expected to have a getURL function which returns the proxied URL, if needed.