public void setClientToken(String clientToken) {
        this.clientToken = clientToken;
    }
<p>
ClientToken is an idempotency token that ensures a call to <code>UpdateDatasetEntries</code> completes only once.
You choose the value to pass. For example, An issue might prevent you from getting a response from
<code>UpdateDatasetEntries</code>. In this case, safely retry your call to <code>UpdateDatasetEntries</code> by
using the same <code>ClientToken</code> parameter value.
</p>
<p>
If you don't supply a value for <code>ClientToken</code>, the AWS SDK you are using inserts a value for you. This
prevents retries after a network error from making multiple updates with the same dataset entries. You'll need to
provide your own value for other use cases.
</p>
<p>
An error occurs if the other input parameters are not the same as in the first request. Using a different value
for <code>ClientToken</code> is considered a new call to <code>UpdateDatasetEntries</code>. An idempotency token
is active for 8 hours.
</p>

@param clientToken
       ClientToken is an idempotency token that ensures a call to <code>UpdateDatasetEntries</code> completes
       only once. You choose the value to pass. For example, An issue might prevent you from getting a response
       from <code>UpdateDatasetEntries</code>. In this case, safely retry your call to
       <code>UpdateDatasetEntries</code> by using the same <code>ClientToken</code> parameter value.</p>
       <p>
       If you don't supply a value for <code>ClientToken</code>, the AWS SDK you are using inserts a value for
       you. This prevents retries after a network error from making multiple updates with the same dataset
       entries. You'll need to provide your own value for other use cases.
       </p>
       <p>
       An error occurs if the other input parameters are not the same as in the first request. Using a different
       value for <code>ClientToken</code> is considered a new call to <code>UpdateDatasetEntries</code>. An
       idempotency token is active for 8 hours.
aws-java-sdk-lookoutforvision/src/main/java/com/amazonaws/services/lookoutforvision/model/UpdateDatasetEntriesRequest.java