[Sirius] Asset diagram, the Link creation doesn't work
in the current version the link creation fails with the following stack trace
org.eclipse.sirius.ecore.extender.business.api.accessor.exception.FeatureNotFoundException: subgroups on fr.irisa.atsyra.absystem.model.absystem.impl.AssetGroupImpl@232a0cfd (name: agenceInformationSystem)
at org.eclipse.sirius.ecore.extender.business.api.accessor.ModelAccessor.eIsMany(ModelAccessor.java:321)
at org.eclipse.sirius.business.internal.helper.task.operations.CreateInstanceTask.execute(CreateInstanceTask.java:89)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:119)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:126)