Element cleanPlugin = plugins.children("plugin")
                    .filter(p -> "maven-clean-plugin"
                            .equals(p.child("artifactId").orElse(null).textContent()))
                    .findFirst()
                    .orElse(null);
            assertNotNull(cleanPlugin);

            Element cleanExecutions = cleanPlugin.child("executions").orElse(null);
            Element preCleanExecution = cleanExecutions

   * will match, use {@link #tryFind} or {@link #find(Iterable, Predicate, Object)} instead.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(predicate).findFirst().get()}
   *
   * @throws NoSuchElementException if no element in {@code iterable} matches the given predicate
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T find(

        return getProjectArtifacts(project)
                .filter(artifact ->
                        Objects.equals(requestedRepositoryConflictId, ArtifactIdUtils.toVersionlessId(artifact)))
                .findFirst()
                .orElse(null);
    }

    /**
     * Determines whether the specified artifact refers to test classes.
     *
     * @param artifact The artifact to check, must not be {@code null}.

   * streams.
   *
   * <p>If the stream has nondeterministic order, this has equivalent semantics to {@link
   * Stream#findAny} (which you might as well use).
   *
   * @see Stream#findFirst()
   * @throws NullPointerException if the last element of the stream is null
   */
  /*
   * By declaring <T> instead of <T extends @Nullable Object>, we declare this method as requiring a

            lines.stream()
                .map(String::trim)
                .filter(l -> !l.isEmpty() && !l.startsWith("#"))
                .filter(l -> l.startsWith("distributionUrl"))
                .findFirst()
                .orElseThrow(() -> new IllegalStateException("distributionUrl not found in " + props));

        int idx = distributionUrl.indexOf('=');
        if (idx < 0) {

 * differences include:
 *
 * <ul>
 *   <li>A stream is <i>single-use</i>; it becomes invalid as soon as any "terminal operation" such
 *       as {@code findFirst()} or {@code iterator()} is invoked. (Even though {@code Stream}
 *       contains all the right method <i>signatures</i> to implement {@link Iterable}, it does not

   * streams.
   *
   * <p>If the stream has nondeterministic order, this has equivalent semantics to {@link
   * Stream#findAny} (which you might as well use).
   *
   * @see Stream#findFirst()
   * @throws NullPointerException if the last element of the stream is null
   */
  /*
   * By declaring <T> instead of <T extends @Nullable Object>, we declare this method as requiring a

 * standard. Key differences include:
 *
 * <ul>
 *   <li>A stream is <i>single-use</i>; it becomes invalid as soon as any "terminal operation" such
 *       as {@code findFirst()} or {@code iterator()} is invoked. (Even though {@code Stream}
 *       contains all the right method <i>signatures</i> to implement {@link Iterable}, it does not

                return result;
            } else {
                session.getAllProjects().stream()
                        .filter(MavenProject::isExecutionRoot)
                        .findFirst()
                        .ifPresent(buildResumptionDataRepository::removeResumptionData);
            }
        } finally {
            try {
                afterSessionEnd(session);

            try (Stream<String> lines = Files.lines(file.toPath())) {
                String packageLine = lines.filter(line -> line.startsWith("package"))
                    .findFirst()
                    .orElseThrow(() -> new IOException("Can't find package definition in file " + file));
                Matcher matcher = pattern.matcher(packageLine);
                if (matcher.find()) {