in src/activationList.ts [31:42]
constructor(public context: vscode.ExtensionContext, entity: vscode.TreeView<WskEntity>) {
entity.onDidChangeSelection((e) => {
if (e.selection[0] instanceof WskAction) {
this.selectedEntity = e.selection[0] as WskAction;
} else if (e.selection[0] instanceof WskNamespace) {
this.selectedEntity = e.selection[0] as WskNamespace;
} else {
this.selectedEntity = undefined;
}
this.refresh();
});
}