public DescribeCollectionResult withCreationTimestamp(java.util.Date creationTimestamp) {
        setCreationTimestamp(creationTimestamp);
        return this;
    }
<p>
The number of milliseconds since the Unix epoch time until the creation of the collection. The Unix epoch time is
00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970.
</p>

@param creationTimestamp
       The number of milliseconds since the Unix epoch time until the creation of the collection. The Unix epoch
       time is 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/DescribeCollectionResult.java