[WIP] [FEATURE] implemented load tree by a child node

implemented load tree by a child node:

__Tasks:__

- [ ] test coverage
- [ ] gather feedback for my changes


__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  |yes
| Tests pass?   | yes
| Fixed tickets | none
| Doc           | none