code: function buildSVG(container) {
              if (!svg) {
                  svg = d3Selection.select(container)
                      .append('svg')
                        .classed('britechart bullet-chart', true);
  
                  buildContainerGroups();
              }
  
              svg
                  .attr('width', width)
                  .attr('height', height);
          }
docs: Builds the SVG element that will contain the chart
  @param  {HTMLElement} container DOM element that will work as the container of the graph
  @return {void}
  @private