public void setEtag(ETag etag) {
        this.etag = etag;
    }
<p>
The entity tag (ETag) is a hash of the object meant to represent its semantic content.
</p>

@param etag
       The entity tag (ETag) is a hash of the object meant to represent its semantic content.
aws-java-sdk-omics/src/main/java/com/amazonaws/services/omics/model/GetReadSetMetadataResult.java