public void setConflictHandler(String conflictHandler) {
        this.conflictHandler = conflictHandler;
    }
<p>
The Conflict Resolution strategy to perform in the event of a conflict.
</p>
<ul>
<li>
<p>
<b>OPTIMISTIC_CONCURRENCY</b>: Resolve conflicts by rejecting mutations when versions don't match the latest
version at the server.
</p>
</li>
<li>
<p>
<b>AUTOMERGE</b>: Resolve conflicts with the Automerge conflict resolution strategy.
</p>
</li>
<li>
<p>
<b>LAMBDA</b>: Resolve conflicts with an Lambda function supplied in the <code>LambdaConflictHandlerConfig</code>
.
</p>
</li>
</ul>

@param conflictHandler
       The Conflict Resolution strategy to perform in the event of a conflict.</p>
       <ul>
       <li>
       <p>
       <b>OPTIMISTIC_CONCURRENCY</b>: Resolve conflicts by rejecting mutations when versions don't match the
       latest version at the server.
       </p>
       </li>
       <li>
       <p>
       <b>AUTOMERGE</b>: Resolve conflicts with the Automerge conflict resolution strategy.
       </p>
       </li>
       <li>
       <p>
       <b>LAMBDA</b>: Resolve conflicts with an Lambda function supplied in the
       <code>LambdaConflictHandlerConfig</code>.
       </p>
       </li>
@see ConflictHandlerType
aws-java-sdk-appsync/src/main/java/com/amazonaws/services/appsync/model/SyncConfig.java