public void setIndexId(String indexId) {
        this.indexId = indexId;
    }
<p>
The identifier of the index to add the documents to. You need to create the index first using the
<code>CreateIndex</code> API.
</p>

@param indexId
       The identifier of the index to add the documents to. You need to create the index first using the
       <code>CreateIndex</code> API.
aws-java-sdk-kendra/src/main/java/com/amazonaws/services/kendra/model/BatchPutDocumentRequest.java