'Creates a new instance of a missing session.  Instead of overriding
this method we recommend replacing the :class:`session_interface`.
.. deprecated: 1.0
Will be removed in 1.1. Use ``session_interface.make_null_session``
instead.
.. versionadded:: 0.7'

def make_null_session(self):

    warnings.warn(DeprecationWarning('"make_null_session"    is    deprecated    and    will    be    removed    in    1.1.    Use    "session_interface.make_null_session"    instead.'))
    return self.session_interface.make_null_session(self)
