NativeScript/e2e/ui-tests-app/app/tabs/nested-bottom-navigation-page.xml

<Page class="page">

    <ActionBar title="Tabs nested in Layout" icon="" class="action-bar">
    </ActionBar>

    <BottomNavigation>
      <TabStrip>
          <TabStripItem title="First"></TabStripItem>
          <TabStripItem title="Second"></TabStripItem>
      </TabStrip>

      <TabContentItem>
          <Tabs>
            <TabStrip backgroundColor="palevioletred">
                <TabStripItem title="First"></TabStripItem>
                <TabStripItem title="Second"></TabStripItem>
            </TabStrip>

            <TabContentItem>
                <GridLayout backgroundColor="skyblue">
                  <Label text="First View"/>
                </GridLayout>
            </TabContentItem>

            <TabContentItem>
                <GridLayout backgroundColor="gold">
                  <Label text="Second View" />
                </GridLayout>
            </TabContentItem>
          </Tabs>
      </TabContentItem>

      <TabContentItem>
          <GridLayout>
            <Label text="Second View" />
          </GridLayout>
      </TabContentItem>
    </BottomNavigation>
  </Page>