/// <summary>
/// Joins together the results from several plans.
/// </summary>
public static Observable Join(Plan p1, Plan p2, Plan p3, Plan p4) { return default(Observable); }
/// <summary>
/// Joins together the results from several plans.
/// </summary>
public static Observable Join(Plan p1, Plan p2, Plan p3, Plan p4, Plan p5, Plan p6, Plan p7, Plan p8) { return default(Observable); }
/// <summary>
/// Joins together the results from several plans.
/// </summary>
public static Observable Join(Plan p1) { return default(Observable); }