code: def __dir__(self):
      obj_dir = object.__dir__(self)
      if self._data is not None:
          obj_dir = sorted(set(dir(self._data) + obj_dir))
      return obj_dir
  
imports: from ...serialization.serializables import Serializable, FieldTypes, DictField, ReferenceField
  from ...utils import AttributeDict
  from ..base import Base
label_desc: Use image node_id 2 for calling the Entity obj's underlying member method code with example usage: obj.__dir__() and returns: obj_dir