private static IDictionary <Target, double> GetFirstRetentionTimes( SrmSettings settings, RetentionTimeSource retentionTimeSource) { var libraryRetentionTimes = settings.GetRetentionTimes(MsDataFileUri.Parse(retentionTimeSource.Name)); if (null == libraryRetentionTimes) { return(new Dictionary <Target, double>()); } return(libraryRetentionTimes.GetFirstRetentionTimes()); }