public SomeObjectThatContainsFileForExamplePipedInputStream callSomeMethodAndRecieveDownloadedFileInSomeForm(final String name) throws IOException {
        //here any instance of OutputStream - it needs to be passed to client.getFile lower (for now it is PipedOutputStream)
        PipedInputStream inputStream = new PipedInputStream(); // for now
        PipedOutputStream outputStream = new PipedOutputStream(inputStream);


        //some dropbox client object
        DbxClient client = new DbxClient();
        try {
            //important part - Dropbox API downloads the file from Dropbox servers to the outputstream object passed as the third parameter
            client.getFile("/" + name, null, outputStream);
        } catch (DbxException e){
            e.printStackTrace();
        } finally {
            outputStream.close();
        }
        return inputStream;
    }