code: protected void setCellMergeChild(RtfCell mergeParent) {
          this.mergeType = MERGE_VERT_CHILD;
          this.cellWidth = mergeParent.getCellWidth();
          this.cellRight = mergeParent.getCellRight();
          this.cellPadding = mergeParent.getCellpadding();
          this.borders = mergeParent.getBorders();
          this.verticalAlignment = mergeParent.getVerticalAlignment();
          this.backgroundColor = mergeParent.getRtfBackgroundColor();
      }
docs: Merge this cell into the parent cell.
  
  @param mergeParent The RtfCell to merge with