final float importantContentBoost = fessConfig.getQueryBoostImportantContentAsDecimal().floatValue();
        if (importantContentBoost >= 0.0f) {
            boolQuery.should(builder.apply(fessConfig.getIndexFieldImportantContent(), importantContentBoost));
        }
        final float importantContantLangBoost = fessConfig.getQueryBoostImportantContentLangAsDecimal().floatValue();

     * The value is, e.g. important_content <br>
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexFieldImportantContent();

    /**
     * Get the value for the key 'index.field.content'. <br>
     * The value is, e.g. content <br>