/// <summary>
/// Ensures an underlying geometry graph factory for the specified geometry factory.
/// </summary>
/// <param name="factory">The geometry factory.</param>
/// <returns>The factory with the appropriate geometry graph factory.</returns>
private static void EnsureFactory(IGeometryFactory factory)
{
if (factory.ContainsFactory <IGeometryGraphFactory>())
{
return;
}
factory.EnsureFactory <IGeometryGraphFactory>(new GeometryGraphFactory(factory));
}
