code: public AT_Row setPaddingBottom(int paddingBottom) {
  		if(this.hasCells()){
  			for(AT_Cell cell : this.getCells()){
  				cell.getContext().setPaddingBottom(paddingBottom);
  			}
  		}
  		return this;
  	}
docs: Sets the bottom padding for all cells in the row.
  @param paddingBottom new padding, ignored if smaller than 0
  @return this to allow chaining