The now defunct Simulator class, in addition to the Sundials-native forward sensitivity support (#3045), is able to use problem-specific scaling factors (all other features, such as the control support, has been ported to Integrator as part of #2823). This is relevant for FMU DAEs, where nominal values are readily available and important for numerical stability.

This feature can be ported from the CVODES plugin in the Simulator class, which can be accessed in the simulator branch branch.