/// <summary>
/// The <a href="https://tools.ietf.org/html/rfc3977#section-7.4">NEWNEWS</a>
/// command returns a list of message-ids of articles posted or
/// received on the server, in the newsgroups whose names match the
/// wildmat, since the specified date and time.
/// </summary>
/// <param name="wildmat">The wildmat to use for filtering the group names.</param>
/// <param name="sinceDateTime">List all newsgroups that have new articles
/// posted or received since this date and time.</param>
/// <returns>A multi-line response containing a list of message-ids.</returns>
public NntpMultiLineResponse NewNews(string wildmat, NntpDateTime sinceDateTime) =>
connection.MultiLineCommand($"NEWNEWS {sinceDateTime}", new MultiLineResponseParser(230));
/// <summary>
/// The <a href="https://tools.ietf.org/html/rfc3977#section-7.3">NEWGROUPS</a>
/// command returns a list of newsgroups created on the server since
/// the specified date and time.
/// </summary>
/// <param name="sinceDateTime">List all newsgroups created since this date and time.</param>
/// <returns>A groups response object.</returns>
public NntpGroupsResponse NewGroups(NntpDateTime sinceDateTime) =>
connection.MultiLineCommand($"NEWGROUPS {sinceDateTime}", new GroupsResponseParser(231, GroupStatusRequestType.Basic));
