def add_symbol(self, symbol_name, namespace_stack, node, module):
        # TODO(nnorwitz): verify symbol_name doesn't contain :: ?
        if namespace_stack:
            # Handle non-global symbols (ie, in some namespace).
            last_namespace = self.namespaces
            for namespace in namespace_stack:
                last_namespace = last_namespace.setdefault(namespace, {})
        else:
            last_namespace = self.namespaces[None]
        return self._add(symbol_name, last_namespace, node, module)
Verify VM (live) migration.
dataset/ETHPy150Open myint/cppclean/cpp/symbols.py/SymbolTable.add_symbol--crossover with--dataset/ETHPy150Open openstack/networking-cisco/networking_cisco/tests/unit/ml2/drivers/cisco/nexus/test_cisco_mech.py/TestCiscoPortsV2.test_nexus_vm_migration