code: def get_fullsize(self, kwargs):
          
          fullsize_args = {}
  
          if 'absolute' in kwargs:
              fullsize_args['absolute'] = kwargs['absolute']
  
          for key in ('width', 'height', 'quality', 'format', 'background', 'crop'):
              fsk = 'fullsize_' + key
              if fsk in kwargs:
                  fullsize_args[key] = kwargs[fsk]
  
          img_fullsize, _ = self.get_rendition(1, **fullsize_args)
          return img_fullsize
docs: Get the fullsize rendition URL