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     - set AUTO_CONTEXTUALIZE to False in config.json
     - call myplotlib.mpl_contextualize(context)

This can be useful while designing remote figures preventing
always to reload mpl module after modifying config file.

       from json file. ``config.json``. json format was choosen
       because it is part of default python distribution and does
       not require extra dependancy. Alternative could YAML but
       requires PyYAML.