stateObservation::IndexedVectorArray offlineEKFFlexibilityEstimation(const stateObservation::IndexedVectorArray &y, const stateObservation::IndexedVectorArray &u, const Vector &xh0, unsigned numberOfContacts, const std::vector< Vector3, Eigen::aligned_allocator< Vector3 >> &contactsPositions, double dt, IndexedVectorArray *ino=0x0, IndexedVectorArray *premea=0x0)