class_docstr: Manage and provide access to all of the models that belong to a Bokeh
  Document.
  
  The set of "all models" means specifically all the models reachable from
  references form a Document's roots.
class_docstr_tok: ["Manage","and","provide","access","to","all","of","the","models","that","belong","to","a","Bokeh","Document",".","The","set","of","``","all","models","''","means","specifically","all","the","models","reachable","from","references","form","a","Document","'s","roots","."]
code: def synced_references(self) -> set[Model]:
      return set(
          model
          for model in self._models.values()
          if model not in self._new_models
      )
  
imports: from __future__ import annotations
  import logging
  import contextlib
  import weakref
  from typing import TYPE_CHECKING, Callable, Generator, Iterator
  from ..core.types import ID
  from ..model import Model
  from ..util.datatypes import MultiValuedDict
label_desc: Use image node_id 12 for calling the DocumentModelManager obj's underlying member method code with example usage: obj.synced_references() and returns: set