/// <reference types="node" />
import { Readable } from 'stream';
import { SequenceOptions } from './sequenceOptions';
/**
 * Wraps multiple readable streams into a sequence
 */
export default class Sequence extends Readable {
    /**
     * @param objectMode Object mode setting
     * @param abortOnError True if error in sequence should emit error, false otherwise
     */
    static DEFAULT_OPTIONS: {
        objectMode: boolean;
        abortOnError: boolean;
    };
    private _options;
    private _context;
    private _stream;
    private readonly _nextStreamGetter?;
    private readonly _onStreamEndHandler;
    private readonly _onStreamCloseHandler;
    private readonly _onStreamDataHandler;
    private readonly _onStreamErrorHandler;
    /**
     * @constructor
     * @param sequence Functor-factory or array of Readable streams
     * @param options Sequence options
     */
    constructor(sequence: Function | Array<NodeJS.ReadableStream>, options?: SequenceOptions);
    /**
     * https://nodejs.org/api/stream.html#stream_readable_read_size_1
     */
    _read(size: any): void;
    /**
     * https://nodejs.org/api/stream.html#stream_readable_destroy_err_callback
     */
    _destroy(error: any, callback: any): void;
    /**
     * Obtains next stream
     */
    _obtainNextStream(): void;
    /**
     * Detaches from current stream
     */
    _detachFromStream(): void;
    /**
     * Handles stream end event
     */
    _onStreamEnd(): void;
    /**
     * Handles stream close event
     */
    _onStreamClose(): void;
    /**
     * Handles stream error event
     */
    _onStreamError(error: Error): void;
    /**
     * Handles stream readable event
     */
    _onStreamData(chunk: any): void;
}