/**
     * Default constructor.
     */
    public ActionForm() {
        // nothing
    }

    /**
     * The flag to replace aliases.
     */
    @Size(max = 10)
    public String replaceAliases;

    /**
     * The flag to reset dictionaries.
     */
    @Size(max = 10)
    public String resetDictionaries;

    /**
     * The number of shards for doc.
     */
    @Size(max = 10)