/**
 * Creates a readable stream from an collection of values.
 *
 * @group Sources
 * @example
 * Using an iterable
 * ```
 * fromCollection([1, 2, 3, 4])
 * ```
 *
 * Using an Async Iterable
 * ```
 * fromCollection((async function* () {
 *   yield 1
 * })())
 * ```
 *
 * Using an ArrayLike
 * ```
 * fromCollection({
 *   0: 'zero',
 *   1: 'one',
 *   2: 'two',
 *   length: 3,
 * })
 * ```
 */
export declare function fromCollection<T>(collection: Iterator<T> | Iterable<T> | AsyncIterator<T> | AsyncIterable<T> | ArrayLike<T>, queuingStrategy?: QueuingStrategy<T>): ReadableStream<T>;
/**
 * An underlying source for an `Iterator` or `AsyncIterator`.
 *
 * @group Sources
 * @example
 * ```
 * const reader = new ReadableStream(new IteratorSource((function* () {
 *   yield 1
 *   yield 2
 * })()))
 * ```
 */
export declare class IteratorSource<T> implements UnderlyingDefaultSource<T> {
    #private;
    constructor(iterator: Iterator<T> | AsyncIterator<T>);
    pull(controller: ReadableStreamDefaultController<T>): Promise<void>;
}
/**
 * An underlying source for an `ArrayLike`.
 *
 * @group Sources
 * @example
 * ```
 * const reader = new ReadableStream(new ArrayLikeSource({
 *   0: 'zero',
 *   1: 'one',
 *   length: 2
 * }))
 * ```
 */
export declare class ArrayLikeSource<T> implements UnderlyingDefaultSource<T> {
    #private;
    constructor(arrayLike: ArrayLike<T>);
    start(controller: ReadableStreamDefaultController<T>): void;
    pull(controller: ReadableStreamDefaultController<T>): void;
}