Added a missing override of getReferences() for ImplicitPlaceArc that caused a NullPointerException when serialising nodes.
Added a missing override of getReferences() for ImplicitPlaceArc that caused a NullPointerException when serialising nodes.
danilovesky/workcraft,workcraft/workcraft,danilovesky/workcraft,workcraft/workcraft,workcraft/workcraft,tuura/workcraft,jrbeaumont/workcraft,tuura/workcraft,tuura/workcraft,danilovesky/workcraft,danilovesky/workcraft,workcraft/workcraft,jrbeaumont/workcraft,jrbeaumont/workcraft