/// <summary>
/// Get the reference plan corresponding to the provided plan name.
/// </summary>
/// <param name="planName">The name of the plan to get.</param>
/// <returns>Returns the reference plan, if found. Otherwise null.</returns>
public VoteLineBlock?GetReferencePlan(Origin planOrigin)
{
return(ReferencePlans.GetValueOrDefault(planOrigin));
}
