public LogViewerViewModel(IDataSourceViewModel dataSource,
IActionCenter actionCenter,
IApplicationSettings applicationSettings,
TimeSpan maximumWaitTime)
{
_actionCenter = actionCenter ?? throw new ArgumentNullException(nameof(actionCenter));
_applicationSettings = applicationSettings ?? throw new ArgumentNullException(nameof(applicationSettings));
_maximumWaitTime = maximumWaitTime;
_dataSource = dataSource ?? throw new ArgumentNullException(nameof(dataSource));
_pendingSections = new List <KeyValuePair <ILogSource, LogSourceModification> >();
LogSource = _dataSource.DataSource.FilteredLogSource;
LogSource.AddListener(this, _maximumWaitTime, 1000);
Search = _dataSource.DataSource.Search;
UpdateCounts();
}