public void setAssociationTimestamp(java.util.Date associationTimestamp) {
        this.associationTimestamp = associationTimestamp;
    }
<p>
The time that the client device was associated, expressed in ISO 8601 format.
</p>

@param associationTimestamp
       The time that the client device was associated, expressed in ISO 8601 format.
aws-java-sdk-greengrassv2/src/main/java/com/amazonaws/services/greengrassv2/model/AssociatedClientDevice.java