def IsExclusiveStorageEnabledNode(cfg, node):
  return cfg.GetNdParams(node)[constants.ND_EXCLUSIVE_STORAGE]
Validate that the username is alphanumeric and is not already
dataset/ETHPy150Open ganeti/ganeti/lib/cmdlib/common.py/IsExclusiveStorageEnabledNode--crossover with--dataset/ETHPy150Open lig/django-registration-me/registration/forms.py/RegistrationForm.clean_username