class_docstr: Alias of another property of a model showing a deprecation message when used.
code: def __init__(
      self,
      aliased_name: str,
      *,
      since: Version,
      extra: str | None = None,
      help: str | None = None,
  ) -> None:
      super().__init__(aliased_name, help=help)
      self.since = since
      self.extra = extra
  
file_path: bokeh/src/bokeh/core/property/alias.py
imports: from __future__ import annotations
  import logging
  from typing import ClassVar, TypeVar
  from ...util.deprecation import Version
  from .bases import Property
  from .descriptors import AliasPropertyDescriptor, DeprecatedAliasPropertyDescriptor, PropertyDescriptor
label_desc: Use image node_id 1 to create a new DeprecatedAlias object from inherited base classes: Alias with example: obj = DeprecatedAlias(aliased_name)