In this example, you can see how to achieve drilldown concept using pie control. An automobile sales has been shown by different category, on clicking each category, you can navigate to next level, which shows the sales of those category in terms of company. Datalabel is used in this sample. Injecting Module Accumulation chart component features are segregated into individual feature-wise modules. To use datalabel, we need to inject AccumulationDataLabelService into the @NgModule.providers section..