public void setCreatedAt(java.util.Date createdAt) {
        this.createdAt = createdAt;
    }
<p>
The date and time the channel group was created.
</p>

@param createdAt
       The date and time the channel group was created.
aws-java-sdk-mediapackagev2/src/main/java/com/amazonaws/services/mediapackagev2/model/UpdateChannelGroupResult.java