title: Is createreadstream asynchronous?
body: <p><a href="https://nodejs.org/api/fs.html#fs_fs_createreadstream_path_options" rel="noreferrer">https://nodejs.org/api/fs.html#fs_fs_createreadstream_path_options</a> . 
  I also have a general question . </p>
  
  <p>Can I assume that unless otherwise stated in the documentation , any function mentioned is asynchronous?</p>