* comment: Path to SSL certificate authorities for secure HTTP connections.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getSearchEngineHttpSslCertificateAuthoritiesAsInteger();

    /**
     * Get the value for the key 'search_engine.username'. <br>