public void unrelateAcrossR1013From(MessageArgument_c target, boolean notifyChanges) { if (target == null) return; if (IsSupertypeMessageArgument == null) return; // already unrelated if (target != IsSupertypeMessageArgument) { Exception e = new Exception(); e.fillInStackTrace(); CorePlugin.logError("Tried to unrelate from non-related instance across R1013", e); return; } if (target != null) { target.clearBackPointerR1013To(this); } if (IsSupertypeMessageArgument != null) { m_arg_id = IsSupertypeMessageArgument.getArg_id(); IsSupertypeMessageArgument = null; target.removeRef(); if (notifyChanges) { RelationshipChangeModelDelta change = new RelationshipChangeModelDelta( Modeleventnotification_c.DELTA_ELEMENT_UNRELATED, this, target, "1013", ""); Ooaofooa.getDefaultInstance().fireModelElementRelationChanged(change); } } }