source: frontend/node_modules/is-stream/index.d.ts

import * as stream from 'stream';

declare const isStream: {
        /**
        @returns Whether `stream` is a [`Stream`](https://nodejs.org/api/stream.html#stream_stream).

        @example
        ```
        import * as fs from 'fs';
        import isStream = require('is-stream');

        isStream(fs.createReadStream('unicorn.png'));
        //=> true

        isStream({});
        //=> false
        ```
        */
        (stream: unknown): stream is stream.Stream;

        /**
        @returns Whether `stream` is a [`stream.Writable`](https://nodejs.org/api/stream.html#stream_class_stream_writable).

        @example
        ```
        import * as fs from 'fs';
        import isStream = require('is-stream');

        isStream.writable(fs.createWriteStrem('unicorn.txt'));
        //=> true
        ```
        */
        writable(stream: unknown): stream is stream.Writable;

        /**
        @returns Whether `stream` is a [`stream.Readable`](https://nodejs.org/api/stream.html#stream_class_stream_readable).

        @example
        ```
        import * as fs from 'fs';
        import isStream = require('is-stream');

        isStream.readable(fs.createReadStream('unicorn.png'));
        //=> true
        ```
        */
        readable(stream: unknown): stream is stream.Readable;

        /**
        @returns Whether `stream` is a [`stream.Duplex`](https://nodejs.org/api/stream.html#stream_class_stream_duplex).

        @example
        ```
        import {Duplex} from 'stream';
        import isStream = require('is-stream');

        isStream.duplex(new Duplex());
        //=> true
        ```
        */
        duplex(stream: unknown): stream is stream.Duplex;

        /**
        @returns Whether `stream` is a [`stream.Transform`](https://nodejs.org/api/stream.html#stream_class_stream_transform).

        @example
        ```
        import * as fs from 'fs';
        import Stringify = require('streaming-json-stringify');
        import isStream = require('is-stream');

        isStream.transform(Stringify());
        //=> true
        ```
        */
        transform(input: unknown): input is stream.Transform;
};

export = isStream;