private static ISourceBlock <TOutput> TransformDataflowsHelper <TOutput, TDataflow>(DataflowType <TOutput, TDataflow> dataflowType, ISourceBlock <IDataflow <TOutput> > dataflows)
     where TDataflow : IDataflow <TOutput>
 {
     return(dataflowType.TransformDataFlows(dataflows.Cast <TDataflow>()));
 }