theModifiersPackage.initializePackageContents();
theOperatorsPackage.initializePackageContents();
theParametersPackage.initializePackageContents();
theReferencesPackage.initializePackageContents();
theStatementsPackage.initializePackageContents();
theTypesPackage.initializePackageContents();
theVariablesPackage.initializePackageContents();
theCorePackage.initializePackageContents();
// Mark meta-data to indicate it can't be changed
theExpressionsPackage.freeze();