Expose histogram bin estimators?

Would it be possible to expose the histogram bin estimators available in numpy? e.g. https://github.com/numpy/numpy/blob/e94ed84010c60961f82860d146681d3fd607de4e/numpy/lib/function_base.py#L393 and others.

We would find it useful in Matplotlib for computing bins without having to spend time computing the full histogram (xref https://github.com/matplotlib/matplotlib/issues/8636)