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    <h1>Timer constructor</h1>

    <section class="multi-line-signature">
      
      <span class="name ">Timer</span>(<wbr><span class="parameter" id="-param-duration"><span class="type-annotation"><a href="dart-core/Duration-class.html">Duration</a></span> <span class="parameter-name">duration</span>, </span> <span class="parameter" id="-param-callback"><span class="type-annotation">void</span> <span class