text: from warnings import warn
  
  from django.template.loader import render_to_string
  
  from wagtail.admin.compare import ForeignObjectComparison
  from wagtail.admin.panels import FieldPanel
  from wagtail.utils.deprecation import RemovedInWagtail219Warning
  
  
  class ImageChooserPanel(FieldPanel):
      def __init__(self, *args, **kwargs):
          warn(
              "wagtail.images.edit_handlers.ImageChooserPanel is obsolete and should be replaced by wagtail.admin.panels.FieldPanel",
              category=RemovedInWagtail219Warning,
              stacklevel=2,
          )
          super().__init__(*args, **kwargs)
  
  
  class ImageFieldComparison(ForeignObjectComparison):
      def htmldiff(self):
          image_a, image_b = self.get_objects()
  
          return render_to_string(
              "wagtailimages/widgets/compare.html",
              {
                  "image_a": image_a,
                  "image_b": image_b,
              },
          )
  