in packages/sdk/src/fetch-util.ts [307:320]
function abortController(...follow: AbortSignal[]): [signal: AbortSignal, abort: (reason: unknown) => void] {
const controller = new AbortController();
function listener(this: AbortSignal) {
controller.abort(this.reason);
}
for (const signal of follow) {
// request should always have signal, but the cross-fetch polyfill used in tests doesn't comply, hence this check
if (!signal) continue;
signal.addEventListener('abort', listener);
}
return [controller.signal, controller.abort.bind(controller)];
}