code: def format_coord_func(ax, ref):
      
      orig_format_coord = ax.format_coord
  
      def func(x, y):
          orig_s = orig_format_coord(x, y)
          fmto = ref()
          if fmto is None:
              return orig_s
          try:
              orig_s += fmto.add2format_coord(x, y)
          except Exception:
              fmto.logger.debug(
                  'Failed to get plot informations for status bar!', exc_info=1)
          return orig_s
  
      return func
docs: Create a function that can replace the
      :func:`matplotlib.axes.Axes.format_coord`
  
      Parameters
      ----------
      ax: matplotlib.axes.Axes
          The axes instance
      ref: weakref.weakref
          The reference to the :class:`~psyplot.plotter.Formatoption` instance
  
      Returns
      -------
      function
          The function that can be used to replace `ax.format_coord`