code: public void setRowMargin(int l, int t, int r, int b) {
          mRowMargin[0] = l; mRowMargin[1] = t; mRowMargin[2] = r; mRowMargin[3] = b;
      }
docs: Set the margin of each row.
  
  @param l
  @param t
  @param r
  @param b