matplotlib.axes.Axes.get_default_bbox_extra_artists
- 
Axes.get_default_bbox_extra_artists() - 
Return a default list of artists that are used for the bounding box calculation.
Artists are excluded either by not being visible or
artist.set_in_layout(False). 
    © 2012–2018 Matplotlib Development Team. All rights reserved.
Licensed under the Matplotlib License Agreement.
    https://matplotlib.org/3.0.0/api/_as_gen/matplotlib.axes.Axes.get_default_bbox_extra_artists.html