function adjustTextY(y, height, textVerticalAlign) {
	        if (textVerticalAlign === 'middle') {
	            y -= height / 2;
	        }
	        else if (textVerticalAlign === 'bottom') {
	            y -= height;
	        }
	        return y;
	    }
@public
@param {number} y
@param {number} height
@param {string} [textVerticalAlign='top']
@return {number} Adjusted y.