code: function drawHorizontalGridLines() {
              maskGridLines = svg.select('.grid-lines-group')
                  .selectAll('line.vertical-grid-line')
                  .data(xScale.ticks(xTicks).slice(1))
                  .enter()
                    .append('line')
                      .attr('class', 'vertical-grid-line')
                      .attr('y1', (xAxisPadding.left))
                      .attr('y2', chartHeight)
                      .attr('x1', (d) => xScale(d))
                      .attr('x2', (d) => xScale(d))
  
              drawVerticalExtendedLine();
          }
docs: Draws the grid lines for an horizontal bar chart
  @return {void}