/// <summary>
/// Issue a task for a cached query for all active nodes and stations
/// </summary>
/// <param name="searchSpan">Date and time span for the query</param>
public Task Execute(DateTimeRange searchSpan)
{
SearchSpan = searchSpan;
_task = _opcUaQueries.GetAllAggregatedStationsAndNodes(searchSpan);
return(_task);
}
