* comment: Regex pattern for properties to encrypt.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getAppEncryptPropertyPattern();

    /**
     * Get the value for the key 'app.extension.names'. <br>
     * The value is, e.g.  <br>
     * comment: Extension names for application customization.