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.__MethodOptions()
See the dojo/request/iframe.__MethodOptions reference documentation for more information.
The HTTP method to use to make the request. Must be
uppercase. Only "GET" and "POST" are accepted.
Default is "POST".