Use com.nomagic.uml2.ext.jmi.helpers.ModelHelper for various advanced UML model related functions.
It provides utility methods for
Use com.nomagic.uml2.ext.jmi.helpers.InformationFlowHelper for advanced Information Flows related functions
Use com.nomagic.uml2.ext.jmi.helpers.InteractionHelper for Interaction domain related advanced functions
Use com.nomagic.uml2.ext.jmi.helpers.StateMachineHelper for State Machine related advanced functions
Use com.nomagic.uml2.ext.jmi.helpers.UseCaseHelper for Use Case related advanced functions
Use com.nomagic.magicdraw.uml.ConnectorsCollector to collect connected Connector elements