human
Solve the following python programming problem given the following code:
@ property 
def charts(self) : 
    product_dashboard = ProductAvailabilityDashboardChart () 
    product_availability = self.rows 
    def convert_product_data_to_stack_chart(rows, chart_config) : 
        ret_data = [] 
        for k in ['Stocked out', 'Not Stocked out', 'No Stock Data'] : 
            datalist = [] 
            for product in rows : 
                prd_code = SQLProduct.objects.get (product_id = product ['product']).code 
                if (k == 'No Stock Data') : 
                    datalist.append ([prd_code, product ['without_data']]) 
else : 
                    if (k == 'Stocked out') : 
                        datalist.append ([prd_code, product ['without_stock']]) 
else : 
                        if (k == 'Not Stocked out') : 
                            datalist.append ([prd_code, product ['with_stock']]) 
ret_data.append ({ 
                'color' : chart_config.label_color [k], 
                'label' : k, 
                'data' : datalist, 
}) 
return ret_data 
chart = ILSMultiBarChart ('', x_axis = Axis ('Products'), y_axis = Axis ('', format = 'd')) 
    chart.tooltipFormat = ' on ' 
    chart.rotateLabels = (- 45) 
    chart.marginBottom = 60 
    chart.marginRight = 20 
    chart.marginLeft = 50 
    chart.height = 350 
    chart.stacked = convert_product_data_to_stack_chart.chart_stacked 
    for row in convert_product_data_to_stack_chart (product_availability, product_dashboard) : 
        chart.add_dataset (row ['label'], [{ 
            'x' : r [0], 
            'y' : int (round (r [1])), 
} for r in sorted (row ['data'], key = (lambda x : x [0]))], color = row ['color']) 
return [chart] 

    
    

    Fix the buggy line: chart.stacked = convert_product_data_to_stack_chart.chart_stacked
assistant
#Here is Python code to fix the buggy line: chart.

chart.stacked = self.chart_stacked