Reference nodes are not correctly restored from file

This is due to the fact that the nodes do not have a unique identifier to refer to.

added bug label

marked this issue as related to #63 (closed)

changed milestone to %v0.2

assigned to @u.eisenbarth

created branch 62-reference-nodes-are-not-correctly-restored-from-file to address this issue

mentioned in merge request !35 (merged)

mentioned in commit 7f54a140

closed with merge request !35 (merged)