function exports(_selection) {
            _selection.each(function(_data) {
                chartWidth = width - margin.left - margin.right;
                chartHeight = height - margin.top - margin.bottom;
                data = cleanData(_data);

                buildLayout();
                buildColorScale();
                buildShape();
                buildSVG(this);
                drawSlices();
                initTooltip();

                if (highlightedSliceId) {
                    initHighlightSlice();
                }
                if (isEmpty && emptyDataConfig.showEmptySlice) {
                    drawEmptySlice();
                }
            });
        }
This function creates the graph using the selection as container

@param {D3Selection} _selection A d3 selection that represents
                                 the container(s) where the chart(s) will be rendered
@param {DonutChartData} _data The data to attach and generate the chart