class_docstr: A mixin that expects to be mixing in a Query class with
  AbstractAppender.
class_docstr_tok: ["A","mixin","that","expects","to","be","mixing","in","a","Query","class","with","AbstractAppender","."]
docstr: Add an iterable of items to this :class:`_orm.AppenderQuery`.
  
  The given items will be persisted to the database in terms of
  the parent instance's collection on the next flush.
docstr_tok: ["Add","an","iterable","of","items","to","this",":","class",":","`","_orm.AppenderQuery","`",".","The","given","items","will","be","persisted","to","the","database","in","terms","of","the","parent","instance","'s","collection","on","the","next","flush","."]
code: def extend(self, iterator: Iterable[_T]) -> None:
      """Add an iterable of items to this :class:`_orm.AppenderQuery`.
  
      The given items will be persisted to the database in terms of
      the parent instance's collection on the next flush.
  
      """
      self._add_all_impl(iterator)
  
imports: from __future__ import annotations
  from typing import Any
  from typing import Iterable
  from typing import Iterator
  from typing import List
  from typing import Optional
  from typing import Tuple
  from typing import Type
  from typing import TYPE_CHECKING
  from typing import TypeVar
  from typing import Union
  from .None import attributes
  from .None import exc
  from .None import relationships
  from .None import util
  from .base import PassiveFlag
  from .query import Query
  from .session import object_session
  from .writeonly import AbstractCollectionWriter
  from .writeonly import WriteOnlyAttributeImpl
  from .writeonly import WriteOnlyHistory
  from .writeonly import WriteOnlyLoader
  from ..None import util
  from ..engine import result
label_desc: Use image node_id 10 for calling the AppenderMixin obj's underlying member method code with example usage: obj.extend(iterator) without return types