code: def _histplot_op(values, values2, rotated, ax, hist_kwargs):
      
      if values2 is not None:
          raise NotImplementedError("Insert hexbin plot here")
  
      bins = hist_kwargs.pop("bins")
      if bins is None:
          bins = get_bins(values)
      ax.hist(values, bins=bins, **hist_kwargs)
      if rotated:
          ax.set_yticks(bins[:-1])
      else:
          ax.set_xticks(bins[:-1])
      if hist_kwargs["label"] is not None:
          ax.legend()
      return ax
docs: Add a histogram for the data to the axes.