[Haskell-cafe] NFData instance for Numeric.LinearAlgebra Matrix

Hello, Is there already an instance of NFData (from Control.DeepSeq in the deepseq package) for the type Matrix (from Numeric.LinearAlgebra in the hmatrix package) somewhere? If not, how does one define one? (The data declaration for Matrix is in a hidden module, Data.Packed.Internal.Matrix, if that makes any difference). Thanks, Tad