docs: def alt(self):
          """Returns object metadata suitable for use as the HTML ``alt``
          attribute. You can use this method in templates::
  
              <img src="{{ node.file.url }}" alt="{{ node.alt }}" />
  
          """
          if self.override_alt != '' and self.override_alt is not None:
              return self.override_alt
          elif self.override_caption != '' and self.override_caption is not None:
              return self.override_caption
          else:
              return self.get_metadata_display()