public void setInitialTopicId(String initialTopicId) {
        this.initialTopicId = initialTopicId;
    }
<p>
The Amazon QuickSight Q topic ID of the legacy topic that you want the anonymous user to see first. This ID is
included in the output URL. When the URL in response is accessed, Amazon QuickSight renders the Q search bar with
this legacy topic pre-selected.
</p>
<p>
The Amazon Resource Name (ARN) of this Q legacy topic must be included in the <code>AuthorizedResourceArns</code>
parameter. Otherwise, the request fails with an <code>InvalidParameterValueException</code> error.
</p>

@param initialTopicId
       The Amazon QuickSight Q topic ID of the legacy topic that you want the anonymous user to see first. This
       ID is included in the output URL. When the URL in response is accessed, Amazon QuickSight renders the Q
       search bar with this legacy topic pre-selected.</p>
       <p>
       The Amazon Resource Name (ARN) of this Q legacy topic must be included in the
       <code>AuthorizedResourceArns</code> parameter. Otherwise, the request fails with an
       <code>InvalidParameterValueException</code> error.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/AnonymousUserQSearchBarEmbeddingConfiguration.java