public void setCreatedTimestamp(java.util.Date createdTimestamp) {
        this.createdTimestamp = createdTimestamp;
    }
<p>
The time at which the channel membership was created.
</p>

@param createdTimestamp
       The time at which the channel membership was created.
aws-java-sdk-chimesdkmessaging/src/main/java/com/amazonaws/services/chimesdkmessaging/model/ChannelMembership.java