valid Directory Reference

Files
file	ConnectedInteriorTester.cpp
file	ConsistentAreaTester.cpp
file	IsValidOp.cpp
file	QuadtreeNestedRingTester.cpp
file	RepeatedPointTester.cpp
file	SimpleNestedRingTester.cpp
file	SweeplineNestedRingTester.cpp
file	TopologyValidationError.cpp

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