code: def render(self, name, value, attrs=None, renderer=None):
          
          other_instance_languages = None
          if value and value != "-DUMMY-":
              if get_parent_language_code(self.parent_object):
                  # Parent is a multilingual object, provide information
                  # for the copy dialog.
                  other_instance_languages = get_parent_active_language_choices(
                      self.parent_object, exclude_current=True)
  
          context = {
              'cp_plugin_list': list(self.plugins),
              'placeholder_id': '',
              'placeholder_slot': self.slot,
              'other_instance_languages': other_instance_languages,
          }
          return mark_safe(render_to_string('admin/fluent_contents/placeholderfield/widget.html', context))
docs: Render the placeholder field.