<span class="ident">copy</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="kw-2">&amp;</span><span class="string">b&quot;Hello World!&quot;</span>[..], <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">encoder</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">encoded_data</span> <span class="op">=</span> <span class="ident">encoder</span>.<span class="ident">finish</span>().<span class="ident">into_resul