True Curves Updates
True if the service allows curve geometries to be updated. This property can only be true if ArcGISFeatureServiceInfo.supportsTrueCurve is true.
If this property is true and ArcGISFeatureServiceInfo.onlyAllowTrueCurveUpdatesByTrueCurveClients is false, features with curve geometries can be updated by any client. This includes cases where the client provides a densified geometry to update the curve geometry.
By default, this API is not a true curve-enabled client. Use ArcGISEnvironment.serviceCurveGeometryMode to change this behavior.