How to extend a class, type or interface in an existing flowtype definition file

[doberkofler]

I'm currently using a jQuery flow definition file (https://github.com/marudor/flowInterfaces) and it seems to works great. I would now also need to add definitions for some jQuery plugins and I cannot see how to extend the existing definition with other plugins sharing the jQuery namespace?

More generally asked. If I for example have an existing flowtype definition file like this:

declare class JQueryStatic {
   ajax(url: string, settings?: any): any;
   /* ... */
}
declare var jQuery: JQueryStatic;
declare var $: JQueryStatic;

How can for example add a new function (ajaxsetup(settings: any);) to this class without changing the existing definition file?

I would have hoped, that something like:

declare class JQueryStatic extends JQueryStatic {
   ajaxsetup(settings: any);
}

would work, but do not find anything like this and flow shows the error JQueryStatic name is already bound.

What is the proper way for extending a class, module or type definition in an external flowtype definition file?

[hon2a]

Looks like a duplicate of #396 .

[vkurchatkin]

@hon2a Thanks!