<div class="form-check form-check-inline">
                                            <la:checkbox styleId="rebuildUserIndex" styleClass="form-check-input" property="rebuildUserIndex"/>
                                            <label for="rebuildUserIndex" class="form-check-label">fess_user</label>
                                        </div>

     */
    @Size(max = 10)
    public String rebuildConfigIndex = Constants.ON;

    /**
     * The flag to rebuild fess_user indices.
     */
    @Size(max = 10)
    public String rebuildUserIndex;

    /**
     * The flag to rebuild fess_log indices.
     */
    @Size(max = 10)
    public String rebuildLogIndex;

        final Set<String> targetPrefixes = new HashSet<>();
        if (isCheckboxEnabled(form.rebuildConfigIndex)) {
            targetPrefixes.add("fess_config");
        }
        if (isCheckboxEnabled(form.rebuildUserIndex)) {
            targetPrefixes.add("fess_user");
        }
        if (isCheckboxEnabled(form.rebuildLogIndex)) {
            targetPrefixes.add("fess_log");
        }