Refactor _call_, _notify_, and _reply_ in astropy.vo.samp to avoid repeated code #2029
Description
A lot of the code between _call_, _notify_, and _reply_ in astropy/vo/samp/hub.py is identical and can be factored out.
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A lot of the code between _call_, _notify_, and _reply_ in astropy/vo/samp/hub.py is identical and can be factored out.