store => next => action => {
      const { payload, type } = action;

      if (type === 'DIRECT_LINE/RECEIVE_ACTIVITY') {
        const { activity } = payload;

        if (activity.type === 'message') {
          readline.clearLine(process.stdout, -1);
          readline.moveCursor(process.stdout, -2, 0);
          console.log(`${ activity.from.name } said: ${ activity.text || '<nothing>' }`);

          const { attachments } = activity;

          if (attachments && attachments.length) {
            console.log(`(With ${ attachments.length } attachments)`);
          }

          console.log();
          rl.prompt();
        }
      } else if (action.type === 'DIRECT_LINE/CONNECTION_STATUS_UPDATE') {
        switch (payload.readyState) {
          case 1:
            console.log('Connecting to bot...');
            break;

          case 2:
            console.log('Connected to bot.');
            rl.prompt();
            break;
        }
      }

      return next(action);
    }

function onProgress(value: number) {
  value = Math.round(value * 100);

  readline.clearLine(process.stdout, 0);
  readline.cursorTo(process.stdout, 0, 1);
  console.log(`${value}%`);
  if (process != null && process.send != null) process.send({ type: "progress", value });
}

        readline.cursorTo(stream, x, y);
    }

    {
        let stream: NodeJS.WritableStream;
        let dx: number | string;
        let dy: number | string;

        readline.moveCursor(stream, dx, dy);
    }

    {
        let stream: NodeJS.WritableStream;
        let dir: number;

        readline.clearLine(stream, dir);
    }

    {
        let stream: NodeJS.WritableStream;

        readline.clearScreenDown(stream);
    }
}

////////////////////////////////////////////////////
/// string_decoder tests : https://nodejs.org/api/string_decoder.html
////////////////////////////////////////////////////

namespace string_decoder_tests {
    const StringDecoder = string_decoder.StringDecoder;

/**
 * Clear current line
 */
function cll(): void {
	readline.clearLine(process.stdout, 0); // Clear current text
	readline.cursorTo(process.stdout, 0, null); // Move cursor to the head of line
}

/**
 * Clear current line
 */
function cll(): void {
	readline.clearLine(process.stdout, 0); // clear current text
	readline.cursorTo(process.stdout, 0, null); // move cursor to beginning of line
}

    readline.emitKeypressEvents(strm);
    readline.emitKeypressEvents(strm, readLineInterface);
}

{
    const strm: NodeJS.WritableStream = new stream.Writable();
    const dx: number | string = 1;
    const dy: number | string = 1;

    readline.moveCursor(strm, dx, dy);
}

{
    const strm: NodeJS.WritableStream = new stream.Writable();
    readline.clearLine(strm, 1);
}

{
    const strm: NodeJS.WritableStream = new stream.Writable();

    readline.clearScreenDown(strm);
}

{
    let _rl = readline.createInterface({
        input: process.stdin,
    });
    let _boolean: boolean;

    _rl = _rl.addListener("close", () => { });

	overwrite(msg:string){
		readline.clearLine(process.stdout, 0)
		readline.cursorTo(process.stdout, 0, null)
		this.log(msg);
	}