                Construct from a string_view
                </p>
                <p>
                  Construct from any object convertible to string_view_type.
                </p>
              </td>
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                <p>
                  <a class="link" href="boost__beast__static_string/substr.html" title="static_string::substr"><span class="bold"><strong>substr</strong></span></a>
                </p>
              </td>
<td>
              </td>
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<td>
                <p>
     