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      <div><h1>errorCallback method</h1></div>

    <section class="multi-line-signature">
      <span class="returntype"><a href="dart-async/AsyncError-class.html">AsyncError</a></span>
            <span class="name ">errorCallback</span>
(<wbr><span class="parameter" id="errorCallback-param-error"><span class="type-annotation"><a href="dart-core/Object-class.html">Object</a></