public PlanTopologySet this[
	Phase phase
] { get; }

Public ReadOnly Property PlanTopologies ( _
	phase As Phase _
) As PlanTopologySet
	Get

public:
property PlanTopologySet^ PlanTopologies[Phase^ phase] {
	PlanTopologySet^ get (Phase^ phase);
}

Accessing plan topologies requires that document is modifiable as it will actually trigger calculating plan topologies if they have not been calculated yet. The time necessary for the calculations may be significant and should be considered.