code: public static CellConstraints xywh(int col, int row, int colSpan, int rowSpan) {
          return xywh(col, row, colSpan, rowSpan, CellConstraints.DEFAULT, CellConstraints.DEFAULT);
      }
docs: Sets the column, row, width, and height; uses default alignments.<p>
  
  <strong>Examples:</strong><pre>
  CC.xywh(1, 3, 2, 1);
  CC.xywh(1, 3, 7, 3);
  </pre>
  
  @param col the new column index
  @param row the new row index
  @param colSpan the column span or grid width
  @param rowSpan the row span or grid height
  @return this