public void setSource2(String source2) {
        this.source2 = source2;
    }
<p>
The ETag hash calculated on Source2 of the read set.
</p>

@param source2
       The ETag hash calculated on Source2 of the read set.
aws-java-sdk-omics/src/main/java/com/amazonaws/services/omics/model/ETag.java