code: public CellConstraints rcw(int row, int col, int colSpan) {
          return rchw(row, col, 1, colSpan, DEFAULT, DEFAULT);
      }
docs: Sets the row, column, height, and width; uses a height (row span) of 1 and the vertical and
  horizontal default alignments.<p>
  
  <strong>Examples:</strong><pre>
  cc.rcw(3, 1, 7);
  cc.rcw(3, 1, 2);
  </pre>
  
  @param row the new row index
  @param col the new column index
  @param colSpan the column span or grid width
  @return this
  
  @since 1.1