code: function () {
        var p = $.fn.textcomplete.getCaretCoordinates(this.el, this.el.selectionStart);
        return {
          top: p.top + this._calculateLineHeight() - this.$el.scrollTop(),
          left: p.left - this.$el.scrollLeft(),
          lineHeight: this._calculateLineHeight()
        };
      }
docs: Private methods ---------------