Distraction option with entity exceptions or attack like vanilla

[DrButtons]

I would like a pack of biters to attack enemy entities in a direction but I don't want them to attack things like rails, or rail signals or power poles.

It seems like this is the case in vanilla (biters not attacking a specific non-polluting entities on their way to polluting ones), but I don't seem to be able to be able to do that with the current distraction api. It would be nice to either have access to the attack move command that is happening under the hood, or (even better! ) to be able to add entity exceptions to distractions.by_enemy