  <div class="ddoc_header_anchor">
  <a href="#shouldBeIn" id="shouldBeIn"><code class="code">shouldBeIn</code></a>
</div>
</div><div class="ddoc_decl">
  <section class="section">
    <div class="declaration">
      <h4>Declaration</h4>
      <div class="dlang">
        <p class="para">
          <code class="code">
            <span class="ddoc_anchor" id="shouldBeIn"></span>void <code class="code">shouldBeIn</code>(T, U)(T <code class="code">value</code>, U[] <code class="code">valid_values</co