          if schema_urls and self.schema_title:
              view_renderers += list(self.schema_renderers)
              schema_generator = SchemaGenerator(
                  title=self.schema_title,
                  patterns=schema_urls
              )
              schema_media_types = [
                  renderer.media_type
                  for renderer in self.schema_renderers
              ]
 
</s>
                url=self.schema_url,
                patterns=api_urls
          if schema_urls and self.schema_title:
              view_renderers += list(self.schema_renderers)
              schema_generator = SchemaGenerator(
                  title=self.schema_title,
                url=self.schema_url,
                patterns=api_urls
              )
              schema_media_types = [
                  renderer.media_type
                  for renderer in self.schema_renderers
              ]
keep keep keep keep replace keep keep keep keep keep
 Added url and schema_url arguments (#4321)
rest_framework/routers.py