/// <summary>
/// Gets emitter count within pipeline and descendant.
/// </summary>
/// <param name="pipeline">Root pipeline diagnostics.</param>
/// <param name="predicate">Predicate expression filtering emitter diagnostics.</param>
/// <returns>Emitter count.</returns>
public static int GetEmitterCount(this PipelineDiagnostics pipeline, Func <PipelineDiagnostics.EmitterDiagnostics, bool> predicate = null)
{
return(pipeline.GetAllEmitterDiagnostics().Where(e => predicate == null ? true : predicate(e)).Count());
}
