add
open fun addDisplacementMarker(displacement: Double, callback: MarkerCallback): TrajectorySequenceBuilder
open fun addDisplacementMarker(scale: Double, offset: Double, callback: MarkerCallback): TrajectorySequenceBuilder
open fun addDisplacementMarker(displacement: DisplacementProducer, callback: MarkerCallback): TrajectorySequenceBuilder
For documentation on this function, see the Roadrunner documentation.