Note: This is not a real constructor, but just a description of the type of object that should be passed as
a parameter to some method(s), and/or the return value from some method(s).
In other words, the type exists only for documentation purposes, and you cannot call new iframe.__BaseOptions()
See the dojo/request/iframe.__BaseOptions reference documentation for more information.
Data to transfer. When making a GET request, this will be converted to key=value parameters and appended to the URL.
How to handle the response from the server. Default is 'text'. Other values are 'json', 'javascript', and 'xml'.
Milliseconds to wait for the response. If this time passes, the then the promise is rejected.