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        <p class='location'><a href='../../index.html'>solicit</a>::<wbr><a href='../index.html'>http</a>::<wbr><a href='index.html'>client</a></p><script>window.sidebarCurrent = {name: 'write_preface', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Function <a href='../../index.html'>solicit</a>::<wbr><a href='../index.html'>http</a>::<wbr><a href='index.html'>client</a>::<wbr><a class='fn' href=''>write_preface</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class='rust fn'>pub fn write_preface&lt;W:&nbsp;<a class='trait' href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html' title='std::io::Write'>Write</a>&gt;(stream: &amp;mut W) -&gt; <a class='enum' href='https://doc.rust-lang.org/nightly/core/result/enum.Result.html' title='core::result::Result'>Result</a>&lt;<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.tuple.html'>()</a>,&nbsp;<a class='struct' href='https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html' title='std::io::error::Error'>Error</a>&gt;</pre><div class='docblock'><p>Writes the client preface to the underlying HTTP/2 connection.</p>

<p>According to the HTTP/2 spec, a client preface is first a specific
sequence of octets, followed by a settings frame.</p>

<h1 id='returns' class='section-header'><a href='#returns'>Returns</a></h1>
<p>Any error raised by the underlying connection is propagated.</p>
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