theModelelementsPackage.initializePackageContents();
theBlocksPackage.initializePackageContents();
thePortandflowsPackage.initializePackageContents();
theConstraintsPackage.initializePackageContents();
theActivitiesPackage.initializePackageContents();
theAllocationsPackage.initializePackageContents();
theRequirementsPackage.initializePackageContents();
theInteractionsPackage.initializePackageContents();
theStatemachinesPackage.initializePackageContents();
// Mark meta-data to indicate it can't be changed