public String getExpectedRevisionId() {
        return this.expectedRevisionId;
    }
<p>
A string value that you can use to conditionally delete your policy. When you provide an expected revision ID, if
the revision ID of the existing policy on the resource doesn't match or if there's no policy attached to the
resource, the request will fail and return a <code>PolicyNotFoundException</code>.
</p>

@return A string value that you can use to conditionally delete your policy. When you provide an expected
        revision ID, if the revision ID of the existing policy on the resource doesn't match or if there's no
        policy attached to the resource, the request will fail and return a <code>PolicyNotFoundException</code>.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/model/DeleteResourcePolicyRequest.java