https://gitlab.informatik.uni-bremen.de/software-security/threatmodeling-core/blob/e0c53bab41b24a519eee41c6c651a288489ab98f/src/de.unibremen.st.threatmodeling.core.logic.ui/de.unibremen.st.threatmodeling.core.logic.ui.dfd/src/de/uni_bremen/st/threatmodeling/core/ui/dfd/wizards/CreateAndInitializeDFDOperation.java#L182
Remove sys out as well.