provides.entrySet().iterator();
        while (providesIter.hasNext()) {
            Map.Entry<String, RequirementMatcher> provideEntry = providesIter.next();
            builder.append(provideEntry.getKey()).append(" = ").append(provideEntry.getValue());
            if (providesIter.hasNext()) {
                builder.append(';');
            }
        }

      Iterator<Entry<Cut<K>, RangeMapEntry<K, V>>> backingItr = entriesInMergeRange.iterator();
      Cut<K> lowerBound = range.lowerBound;
      while (backingItr.hasNext()) {
        RangeMapEntry<K, V> entry = backingItr.next().getValue();
        Cut<K> upperBound = entry.getLowerBound();
        if (!lowerBound.equals(upperBound)) {
          gaps.put(lowerBound, new RangeMapEntry<K, V>(lowerBound, upperBound, value));
        }

        return tempFile;
    }

    public void cleanUp() throws IOException {
        for (Iterator it = filesToDelete.iterator(); it.hasNext(); ) {
            File file = (File) it.next();

            if (file.exists()) {
                if (file.isDirectory()) {
                    FileUtils.deleteDirectory(file);
                } else {
                    file.delete();
                }

        Iterator<TransferResourceAndSize> entries = transfers.values().iterator();
        while (entries.hasNext()) {
            TransferResourceAndSize entry = entries.next();
            // just in case, make sure 0 <= complete <= total
            long complete = Math.max(0, entry.transferredBytes);
            long total = Math.max(complete, entry.resource.getContentLength());

        final List<MavenProject> projectBuilds = graph.getRootSchedulableBuilds();
        assertEquals(1, projectBuilds.size());
        assertEquals(A, projectBuilds.iterator().next());

        final List<MavenProject> subsequent = graph.markAsFinished(A);
        assertEquals(2, subsequent.size());
        assertEquals(ProjectDependencyGraphStub.B, subsequent.get(0));

And it should have an `access_token`, with a string containing our access token.

For this simple example, we are going to just be completely insecure and return the same `username` as the token.

/// tip

In the next chapter, you will see a real secure implementation, with password hashing and <abbr title="JSON Web Tokens">JWT</abbr> tokens.

But for now, let's focus on the specific details we need.

///

Further, the temp. S3 credentials will never out-live the client certificate. For example, if the `MINIO_IDENTITY_TLS_STS_EXPIRY` is 7 days but the certificate itself is only valid for the next 3 days, then MinIO will return S3 credentials that are valid for 3 days only.

## Caveat

    // ...and then putIfAbsent. Simulate failure on both
    when(backingMap.putIfAbsent(eq(KEY), isA(AtomicInteger.class))).thenReturn(existing);

    // next map.get()
    when(backingMap.get(KEY)).thenReturn(existingZero);
    // since get returned zero, try a replace; that fails due to a simulated race

                .append("'")
                .append(LS);

        int idx = 0;
        for (Iterator<Parameter> it = params.iterator(); it.hasNext(); idx++) {
            Parameter param = it.next();

            messageBuffer.append(LS).append("[").append(idx).append("] ");

            decomposeParameterIntoUserInstructions(mojo, param, messageBuffer);

            messageBuffer.append(LS);
        }

         * the association between the artifacts of the same project.
         */
        for (Iterator<? extends Metadata> it = metadatas.iterator(); it.hasNext(); ) {
            Metadata metadata = it.next();
            if (metadata instanceof VersionsMetadata versionsMetadata) {
                it.remove();
                processedVersions.put(versionsMetadata.getKey(), versionsMetadata);
            }
        }
    }