DummyMatrixDataContainer::data returns a pointer to the raw data. The raw data must be stored contiguously in memory, in either row-major order or column-major order (see Storage Order).
2Specification
template <DT>
DT*
data()
This method is only required if the data container is going to be used for an Input/Output or Output argument.
template <DT>
const DT*
data() const
This method is only required if the data container is going to be used for an Input argument.