code: function fillLine(startX, startY, endX, endY) {
           this.strokeLine(startX, startY, endX, endY);
         }
docs: Fill a line of the given two points
  @name fillLine
  @memberOf me.CanvasRenderer.prototype
  @function
  @param {Number} startX the start x coordinate
  @param {Number} startY the start y coordinate
  @param {Number} endX the end x coordinate
  @param {Number} endY the end y coordinate