Requesting addAdditionalEquations() in NumericalPropagatorBuilder
I am using Orekit's Kalman estimator. As you know, KalmanEstimatorBuilder expects an IntegratedPropagatorBuilder, which I am providing in the form of a NumericalPropagatorBuilder. I also need to implement AdditionalEquations in my workflow, but there is no way to provide AdditionalEquations to a NumericalPropagatorBuilder. My only alternative is to subclass NumericalPropagatorBuilder and add my AdditionalEquations every time the buildPropagator(...) method is called. Would it be possible to add the method addAdditionalEquations() in NumericalPropagatorBuilder?
I can look into implementing this capability myself but wanted to post an issue here in case other developers wish to chime in with concerns.