docs: public static void multAddTransAB(DMatrixSparseCSC A , DMatrixRMaj B , DMatrixRMaj C )
      {
          if( A.numCols != C.numRows || B.numRows != C.numCols )
              throw new IllegalArgumentException("Inconsistent matrix shapes. "+stringShapes(A,B,C));
  
          ImplSparseSparseMult_DSCC.multAddTransAB(A,B,C);
      }