public java.util.List<String> getFieldNames() {
        if (fieldNames == null) {
            fieldNames = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return fieldNames;
    }
<p>
A list of the index fields you want to describe. If not specified, information is returned for all configured
index fields.
</p>

@return A list of the index fields you want to describe. If not specified, information is returned for all
        configured index fields.
aws-java-sdk-cloudsearch/src/main/java/com/amazonaws/services/cloudsearchv2/model/DescribeIndexFieldsRequest.java