/** The timestamp field. */
    public static final String TIMESTAMP = "@timestamp";
    /** The tags field. */
    public static final String TAGS = "tags";
    /** The roles field. */
    public static final String ROLES = "roles";
    /** The fields field. */
    public static final String FIELDS = "fields";
    /** The languages field. */
    public static final String LANGUAGES = "languages";

        if (tags == null) {
            this.tags = Collections.emptyList();
        } else {
            this.tags = tags;
        }
        if (roles == null) {
            this.roles = Collections.emptyList();
        } else {
            this.roles = roles;
        }
    }

    /**
     * Returns the elevate word.
     *
     * @return the elevate word
     */
    public String getElevateWord() {

            queryBuilder.must(QueryBuilders.termsQuery(FieldNames.TAGS, tags));
        }
        if (!roles.isEmpty()) {
            queryBuilder.must(QueryBuilders.termsQuery(FieldNames.ROLES, roles));
        } else {
            queryBuilder.must(QueryBuilders.termQuery(FieldNames.ROLES, SuggestConstants.DEFAULT_ROLE));
        }
        if (!fields.isEmpty()) {

    public static final String ELEVATE_WORD_FIELDS = "fields";
    /** Key for elevate word tags. */
    public static final String ELEVATE_WORD_TAGS = "tags";
    /** Key for elevate word roles. */
    public static final String ELEVATE_WORD_ROLES = "roles";

    /** Array settings for elevate words. */
    protected ArraySettings arraySettings;

    /**
     * Constructor.
     * @param settings Suggest settings

     * @param fields the array of fields associated with the search words
     * @param tags the array of tags associated with the search words
     * @param roles the array of roles associated with the search words
     * @param score the score associated with the search words
     * @param readingConverter the converter to use for converting readings

    "docFreq": {
      "type": "long"
    },
    "fields": {
      "type": "keyword"
    },
    "kinds": {
      "type": "keyword"
    },
    "queryFreq": {
      "type": "long"
    },
    "roles": {
      "type": "keyword"
    },
    "languages": {
      "type": "keyword"
    },
    "score": {
      "type": "double"
    },
    "tags": {
      "type": "keyword"
    },
    "text": {