/**
 * ⚠️ straight up copy from @graphql-hive/signal@2.0.0
 *
 * copied because of circular dependencies, where hive gateway monorepo uses whatwg server and also
 * hosts the signal package. importing that package from whatwg-server will fail with tsx. it was
 * thought that this was fixed with a package patch in hive gateway - but apparently not...
 */
/**
 * Memory safe ponyfill of `AbortSignal.any`. In Node environments, the native
 * `AbortSignal.any` seems to be leaky and can lead to subtle memory leaks over
 * a larger period of time.
 *
 * This ponyfill is a custom implementation that makes sure AbortSignals get properly
 * GC-ed as well as aborted.
 */
export declare function abortSignalAny(signals: AbortSignal[]): AbortSignal | undefined;