unneeded_gradients, out_gradients,
                                      absl::MakeSpan(in_gradients));
      if (!persistent_) {
        trace.backward_function_deleter(trace.backward_function);
      }
      if (!s.ok()) {
        return s;
      }
    } else {
      if (!persistent_) {
        trace.backward_function_deleter(trace.backward_function);

        requests.add(new MetadataRequest(metadata, null, REPOSITORY_CONTEXT).setTrace(trace));

        for (RemoteRepository repository : request.getRepositories()) {
            requests.add(new MetadataRequest(metadata, repository, REPOSITORY_CONTEXT).setTrace(trace));
        }

        List<MetadataResult> results = repositorySystem.resolveMetadata(request.getRepositorySession(), requests);

            writer.accept("Thread: " + entry.getKey());
            final StackTraceElement[] trace = entry.getValue();
            for (final StackTraceElement element : trace) {
                writer.accept("\tat " + element);
            }
        }
    }

            RepositorySystemSession session,
            RequestTrace trace,
            Metadata metadata,
            ArtifactRepository repository,
            Exception exception) {
        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.METADATA_INVALID);
        event.setTrace(trace);
        event.setMetadata(metadata);
        event.setException(exception);

org.apache.commons.logging.Log { private static final String FQCN; private org.apache.log4j.Category category; public void Log4JCategoryLog(); public void Log4JCategoryLog(String); public void Log4JCategoryLog(org.apache.log4j.Category); public void trace(Object); public void trace(Object, Throwable); public void debug(Object); public void debug(Object, Throwable); public void info(Object); public void info(Object, Throwable); public void warn(Object); public void warn(Object, Throwable); public void error(Object);...

    [
        ("/items", None, 200, {"ads_id": None}),
        ("/items", {"ads_id": "ads_track"}, 200, {"ads_id": "ads_track"}),
        (
            "/items",
            {"ads_id": "ads_track", "session": "cookiesession"},
            200,
            {"ads_id": "ads_track"},
        ),
        ("/items", {"session": "cookiesession"}, 200, {"ads_id": None}),
    ],
)

			for _, exp := range toExpire {
				if exp.ExpireAll {
					toExpireAll = append(toExpireAll, exp.ObjectInfo)
					continue
				}
				// Cache ObjectInfo value via pointers for
				// subsequent use to track objects which
				// couldn't be deleted.
				od := ObjectToDelete{
					ObjectV: ObjectV{
						ObjectName: exp.Name,
						VersionID:  exp.VersionID,
					},
				}
				toDel = append(toDel, od)

                request.addDependency(pluginDep);
            }

            DependencyRequest depRequest = new DependencyRequest(request, resolutionFilter);
            depRequest.setTrace(trace);

            request.setTrace(RequestTrace.newChild(trace, depRequest));

            node = repoSystem.collectDependencies(pluginSession, request).getRoot();

            if (logger.isDebugEnabled()) {

    [
        ("/items", None, 200, {"ads_id": None}),
        ("/items", {"ads_id": "ads_track"}, 200, {"ads_id": "ads_track"}),
        (
            "/items",
            {"ads_id": "ads_track", "session": "cookiesession"},
            200,
            {"ads_id": "ads_track"},
        ),
        ("/items", {"session": "cookiesession"}, 200, {"ads_id": None}),
    ],
)

void info(Object, Throwable); public boolean isDebugEnabled(); public boolean isErrorEnabled(); public boolean isFatalEnabled(); public boolean isInfoEnabled(); public boolean isTraceEnabled(); public boolean isWarnEnabled(); public void trace(Object); public void trace(Object, Throwable); public void warn(Object); public void warn(Object, Throwable); } org/apache/commons/logging/impl/Log4JCategoryLog.class package org.apache.commons.logging.impl; public final synchronized class Log4JCategoryLog implements...