span><span style="--shiki-dark:#E1E4E8;--shiki-light:#24292E;"> (</span><span style="--shiki-dark:#FFAB70;--shiki-light:#E36209;">event</span><span style="--shiki-dark:#F97583;--shiki-light:#D73A49;">?:</span><span style="--shiki-dark:#B392F0;--shiki-light:#6F42C1;"> KeyEvent</span><span style="--shiki-dark:#E1E4E8;--shiki-light:#24292E;">) </span><span style="--shiki-dark:#F97583;--shiki-light:#D73A49;">=&gt;</span><span style="--shiki-dark:#79B8FF;--shiki-light:#005CC5;"> void</span><span style="--shiki-d