public void setFieldNames(java.util.Collection<String> fieldNames) {
        if (fieldNames == null) {
            this.fieldNames = null;
            return;
        }

        this.fieldNames = new com.amazonaws.internal.SdkInternalList<String>(fieldNames);
    }
<p>
A list of the index fields you want to describe. If not specified, information is returned for all configured
index fields.
</p>

@param fieldNames
       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