How to prevent node deletion?

Hi @marijn,

If I implement the deletion of the node via filterTransaction, what properties of the transaction/state parameters should let me know if the action is “deletion” of a node. I am inspecting the properties of the transaction object inside filterTransaction and so far the info I could use is .docChanged and if the steps array contains any ReplaceStep which affects the nodes that are supposed to be non-deletable. Am I on the right path?