Kaplas

NodeContainerFormat transform methods dispose all the children

1

**Describe the bug** All the children are disposed after calling any Node transform method on a NodeContainerFormat. **To Reproduce** Steps to reproduce the behavior: [TransformNodeContainerProblem.zip](https://github.com/SceneGate/Yarhl/files/3870764/TransformNodeContainerProblem.zip) I've attached a demo to...