docs: public static double dotInnerColumns( DMatrixSparseCSC A , int colA , DMatrixSparseCSC B , int colB,
                                            IGrowArray gw , DGrowArray gx)
      {
          return ImplSparseSparseMult_DSCC.dotInnerColumns(A,colA,B,colB,gw,gx);
      }