public void setIndexId(String indexId) {
        this.indexId = indexId;
    }
<p>
The identifier of the index the data source is attached to.
</p>

@param indexId
       The identifier of the index the data source is attached to.
aws-java-sdk-qbusiness/src/main/java/com/amazonaws/services/qbusiness/model/EligibleDataSource.java