code: def create_from_source(cls, name, config, **kwargs):
          
  
          coordsys = kwargs.pop('coordsys', 'CEL')
  
          roi = cls(config, src_radius=None, src_roiwidth=None,
                    srcname=name, **kwargs)
          src = roi.get_source_by_name(name)
  
          return cls.create_from_position(src.skydir, config,
                                          coordsys=coordsys, **kwargs)
docs: Create an ROI centered on the given source.