export declare function setProfiling(enabled: boolean): void;
export declare function markStart(label: string): void;
export declare function measureMark(label: string): void;
export declare function wrap<T>(value: Array<T> | T | undefined): Array<T>;
export declare function unwrap<T>(arr: Array<T>): Array<T> | T | undefined;
export type NonStringIterable<T> = Iterable<T> & object;
/**
 * Ensures a value is an array.
 *
 * This function does the same thing as wrap() above except it handles nulls
 * and iterables, so it is appropriate for wrapping user-provided element
 * children.
 */
export declare function arrayify<T>(value: NonStringIterable<T> | T | null | undefined): Array<T>;
export declare function isIteratorLike(value: any): value is Iterator<unknown> | AsyncIterator<unknown>;
export declare function isPromiseLike(value: any): value is PromiseLike<unknown>;
export declare function safeRace<T>(contenders: Iterable<T | PromiseLike<T>>): Promise<Awaited<T>>;