public void setRevisionId(String revisionId) {
        this.revisionId = revisionId;
    }
<p>
A unique string that represents the revision ID of the policy. If you're comparing revision IDs, make sure to
always use string comparison logic.
</p>

@param revisionId
       A unique string that represents the revision ID of the policy. If you're comparing revision IDs, make sure
       to always use string comparison logic.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/model/PutResourcePolicyResult.java