def add_vicon_start_stop(axs: np.ndarray, start_i: int, end_i: int) -> None:
"""Add a vertical line to each axes contained in axs (could be multi-dimensional) at start_i, and end_i.
Expand the the axes limits if start_i or end_i does not lie within the Axes.get_xlim().
"""
if isinstance(axs, Iterable):
for ax in axs:
add_vicon_start_stop(ax, start_i, end_i)
elif isinstance(axs, axes.Axes):
if start_i <= axs.get_xlim()[0]:
axs.set_xlim(left=start_i - 5)
if end_i >= axs.get_xlim()[1]:
axs.set_xlim(right=end_i + 5)
axs.axvline(start_i)
axs.axvline(end_i)
else:
raise TypeError(
'Only arrays of matplotlib.axes objects can be utilized.')
