ing the window until
    we explicitly tell it to. If we pass a False value, it will
    instead display the window right away. We can pass the Lisp
    values <code>T</code> or <code>NIL</code>, and the Objective-C
    bridge automatically converts them for us, but in the spirit of
    using Objective-C values for Objective-C operations, let's use the
    Objective-C constants <code>#$YES</code>
    and <code>#$NO</code>:</p>

    <pre>
(ns:with-ns-rect (r 100 100 400 300)
  (#/initWithContentRect:styleMas