docs: public StyleSet setFont(Font font, boolean ignoreHead) {
  		if(false == ignoreHead) {
  			this.headCellStyle.setFont(font);
  		}
  		this.cellStyle.setFont(font);
  		this.cellStyleForNumber.setFont(font);
  		this.cellStyleForDate.setFont(font);
  		return this;
  	}