code: public static DMatrixRMaj convert(DMatrixRBlock src , DMatrixRMaj dst )
      {
          return ConvertDMatrixStruct.convert(src,dst);
      }
docs: Converts a row major block matrix into a row major matrix.
  
  @param src Original DMatrixRBlock..  Not modified.
  @param dst Equivalent DMatrixRMaj.  Modified.