public String getStateMessage() {
        return this.stateMessage;
    }
<p>
Encrypted Amazon EBS snapshots are copied asynchronously. If a snapshot copy operation fails (for example, if the
proper KMS permissions are not obtained) this field displays error state details to help you diagnose why the
error occurred. This parameter is only returned by <a>DescribeSnapshots</a>.
</p>

@return Encrypted Amazon EBS snapshots are copied asynchronously. If a snapshot copy operation fails (for
        example, if the proper KMS permissions are not obtained) this field displays error state details to help
        you diagnose why the error occurred. This parameter is only returned by <a>DescribeSnapshots</a>.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/Snapshot.java