selected tree node in angular(typescript) using jqwidgets

In my html template I have: <jqxTree #treeReference [width]="'100%'" [height]="'100%'" [source]="treeSource"> and in my component typescript file I have the treeSouce declared and initialized. It is displaying the tree view.Am using Angular 6.0.8 and jqwidets for tree view I want to know which was the tree node that is selected.