do nothing if not implemented, instead of throw exception.
* Get the default group for the operations
     *
     * @return The default value is {@link #DEFAULT_GROUP "dubbo"}
     * @since 2.7.5
     */
    default String getDefaultGroup() {
        return DEFAULT_GROUP;
    }
    /**
     * Get the default timeout for the operations in milliseconds
     *
     * @return The default value is <code>-1L</code>
     * @since 2.7.5
     */
    default long getDefaultTimeout() {
        return -1L;
    }
    /**
     * Close the configuration
     *
     * @throws Exception
     * @since 2.7.5
     */
    @Override
    default void close() throws Exception {
        throw new UnsupportedOperationException();
    }
    /**
     * Find DynamicConfiguration instance
     *