@_generative()
def populate_existing(self):
    "Return a :class:`.Query` that will expire and refresh all instances\n        as they are loaded, or reused from the current :class:`.Session`.\n\n        :meth:`.populate_existing` does not improve behavior when\n        the ORM is used normally - the :class:`.Session` object's usual\n        behavior of maintaining a transaction and expiring all attributes\n        after rollback or commit handles object state automatically.\n        This method is not intended for general use.\n\n        "
    self._populate_existing = True
Return a :class:`.Query` that will expire and refresh all instances
as they are loaded, or reused from the current :class:`.Session`.

:meth:`.populate_existing` does not improve behavior when
the ORM is used normally - the :class:`.Session` object's usual
behavior of maintaining a transaction and expiring all attributes
after rollback or commit handles object state automatically.
This method is not intended for general use.
@_generative()
def populate_existing(self):
    "Return a :class:`.Query` that will expire and refresh all instances\n        as they are loaded, or reused from the current :class:`.Session`.\n\n        :meth:`.populate_existing` does not improve behavior when\n        the ORM is used normally - the :class:`.Session` object's usual\n        behavior of maintaining a transaction and expiring all attributes\n        after rollback or commit handles object state automatically.\n        This method is not intended for general use.\n\n        "
    self._populate_existing = True