code: function (str, x, y, useHTML) {
  
  		// declare variables
  		var defaultChartStyle = defaultOptions.chart.style,
  			wrapper;
  
  		x = mathRound(pick(x, 0));
  		y = mathRound(pick(y, 0));
  
  		wrapper = this.createElement('text')
  			.attr({
  				x: x,
  				y: y,
  				text: str
  			})
  			.css({
  				fontFamily: defaultChartStyle.fontFamily,
  				fontSize: defaultChartStyle.fontSize
  			});
  
  		wrapper.x = x;
  		wrapper.y = y;
  		wrapper.useHTML = useHTML;
  		return wrapper;
  	}
docs: Add text to the SVG object
  @param {String} str
  @param {Number} x Left position
  @param {Number} y Top position
  @param {Boolean} useHTML Use HTML to render the text