public Integer getDocumentIndex() {
        return this.documentIndex;
    }
<p>
Denotes the placement of a document in the IdentityDocument list. The first document is marked 1, the second 2
and so on.
</p>

@return Denotes the placement of a document in the IdentityDocument list. The first document is marked 1, the
        second 2 and so on.
aws-java-sdk-textract/src/main/java/com/amazonaws/services/textract/model/IdentityDocument.java