ReferenceFrame.getTransformToParent() returns a copy of transformToParent, while ReferenceFrame.getTransformToParent(RigidBodyTransform transformToPack) calls updateTransformToParent(transformToPack)
ReferenceFrames with unchanging transform to parent have an empty updateTransformToParent and set transformToParent in the constructor. Hence the result does not match ReferenceFrame.getTransformToParent()
ReferenceFrame.getTransformToParent() returns a copy of transformToParent, while ReferenceFrame.getTransformToParent(RigidBodyTransform transformToPack) calls updateTransformToParent(transformToPack)
ReferenceFrames with unchanging transform to parent have an empty updateTransformToParent and set transformToParent in the constructor. Hence the result does not match ReferenceFrame.getTransformToParent()