/// <summary>
/// Initializes new instance of <see cref=" CouchDBServer"/> class.
/// </summary>
/// <param name="handler">CouchDB Handler.</param>
/// <exception cref="ArgumentNullException">Required parameter is null or empty.</exception>
internal CouchDBServer(ICouchDBHandler handler)
{
if (handler == null)
{
throw new ArgumentNullException(nameof(handler));
}
_handler = handler;
}