You are reading an old version of the documentation (v3.1.1). For the latest version see https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.get_shared_x_axes.html
Version 3.1.2
matplotlib
Fork me on GitHub

matplotlib.axes.Axes.get_shared_x_axes

Axes.get_shared_x_axes(self)

Return a reference to the shared axes Grouper object for x axes.