syn-coresym">def</span> <span class="mdzsyn-symbol">btn</span> (<span class="mdzsyn-symbol">gtk-button-new-with-label</span> <span class="mdzsyn-string">"Click Me!"</span>))
  (<span class="mdzsyn-symbol">g-signal-connect-data</span> <span class="mdzsyn-symbol">btn</span> <span class="mdzsyn-string">"clicked"</span> (<span class="mdzsyn-symbol">cb</span>)
                         (<span class="mdzsyn-coresym">fn</span> [<span class="mdzsyn-symbol">btn</span>] (<span class="mdzsyn-symbol">gtk-button-set-labe