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","."]
docstr: Get the default value that will be used for a specific instance.
  
  Args:
      obj (HasProps) : The instance to get the default value for.
  
  Returns:
      object
code: def instance_default(self, obj: HasProps) -> T:
      """Get the default value that will be used for a specific instance.
  
      Args:
          obj (HasProps) : The instance to get the default value for.
  
      Returns:
          object
  
      """
      return self.property.themed_default(
          obj.__class__, self.name, obj.themed_values()
      )
  
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 7 for calling the PropertyDescriptor obj's underlying member method code with example usage: obj.instance_default(obj) and returns: self