Add test for neurom.io.utils.load_trees post-action
Add test for neurom.io.utils.load_trees post-action

lidakanari/NeuroM,mgeplf/NeuroM,liesbethvanherpe/NeuroM,juanchopanza/NeuroM,BlueBrain/NeuroM,eleftherioszisis/NeuroM,wizmer/NeuroM