public ETag withSource1(String source1) {
        setSource1(source1);
        return this;
    }
<p>
The ETag hash calculated on Source1 of the read set.
</p>

@param source1
       The ETag hash calculated on Source1 of the read set.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-omics/src/main/java/com/amazonaws/services/omics/model/ETag.java