serenity/Userland/Libraries/LibWeb/Streams/TransformStreamDefaultController.idl

// https://streams.spec.whatwg.org/#transformstreamdefaultcontroller
[Exposed=*]
interface TransformStreamDefaultController {
    readonly attribute unrestricted double? desiredSize;

    undefined enqueue(optional any chunk);
    undefined error(optional any reason);
    undefined terminate();
};