We'll the "end goal" sounds greater than it actually is. 😄

I just realized there are a couple of manually maintained functions like

@docstring.copy(Figure.ginput)
def ginput(*args, **kwargs):
    return gcf().ginput(*args, **kwargs)

Since we have the logic already in place for Axes it's reasonable to extend it to figures and let boilerplate.py handle these functions. The advantage is that boilerplate.py replicates the full signature and not just *args, **kwargs. This enables code-analysis based features to work, e.g. tab-completion in ipython and parameter checking in IDEs.