class_docstr: A base class for Bokeh properties with simple get/set and serialization
  behavior.
class_docstr_tok: ["A","base","class","for","Bokeh","properties","with","simple","get\/set","and","serialization","behavior","."]
code: def has_unstable_default(self, obj: HasProps) -> bool:
      # _may_have_unstable_default() doesn't have access to overrides, so check manually
      return (
          self.property._may_have_unstable_default()
          or self.is_unstable(
              obj.__overridden_defaults__.get(self.name, None)
          )
      )
  
imports: from __future__ import annotations
  import logging
  from copy import copy
  from types import FunctionType
  from typing import TYPE_CHECKING, Any, Callable, Generic, TypeVar
  from ...util.deprecation import deprecated
  from .singletons import Undefined
  from .wrappers import PropertyValueColumnData, PropertyValueContainer
label_desc: Use image node_id 14 for calling the PropertyDescriptor obj's underlying member method code with example usage: obj.has_unstable_default(obj) and returns: unknown