code: public AT_Row setTextAlignment(TextAlignment textAlignment){
  		if(this.hasCells()){
  			for(AT_Cell cell : this.getCells()){
  				cell.getContext().setTextAlignment(textAlignment);
  			}
  		}
  		return this;
  	}
docs: Sets the text alignment for all cells in the row.
  @param textAlignment new text alignment
  @throws NullPointerException if the argument was null
  @return this to allow chaining
  @throws {@link NullPointerException} if the argument was null