@WithDesc("NotNone")
def TNotNone(val):
  return val is not None
Adds `related_to` and `nullable` to the metadata response.
dataset/ETHPy150Open ganeti/ganeti/lib/ht.py/TNotNone--crossover with--dataset/ETHPy150Open AltSchool/dynamic-rest/dynamic_rest/metadata.py/DynamicMetadata.get_field_info