public void setRevisionId(String revisionId) {
        this.revisionId = revisionId;
    }
<p>
The revision ID of the pull request when the approval state changed.
</p>

@param revisionId
       The revision ID of the pull request when the approval state changed.
aws-java-sdk-codecommit/src/main/java/com/amazonaws/services/codecommit/model/ApprovalStateChangedEventMetadata.java