# `TransformNode.is_bbox`

\... is removed. Instead check the object using
`isinstance(..., BboxBase)`.

# `rcsetup.interactive_bk`, `rcsetup.non_interactive_bk` and `rcsetup.all_backends`

\... are removed and replaced by
`matplotlib.backends.backend_registry.list_builtin` with the following
arguments

-   `matplotlib.backends.BackendFilter.INTERACTIVE`
-   `matplotlib.backends.BackendFilter.NON_INTERACTIVE`
-   `None`

# `BboxTransformToMaxOnly`

\... is removed. It can be replaced by
`BboxTransformTo(LockableBbox(bbox, x0=0, y0=0))`.

# *interval* parameter of `TimerBase.start`

The timer interval parameter can no longer be set while starting it. The
interval can be specified instead in the timer constructor, or by
setting the timer.interval attribute.