Feature request: be able to include a component and all its children tree

Is it available to add a feature that enable us to include a component and all its descendent (children) components?

For example I have this code

<Parent>
  <A>
    <B>
      <C>Hello</C>
    </B>
  </A>
</Parent>

I want to be able to include A and all its children (in this case A, B & C)

In large pages it is very difficult to include a section and its children with regex and it is almost impossible to track all components