.findFirst()
                .orElse(null);
        assertNotNull(plugin, "Unable to find plugin with artifactId: " + artifactId);
        List<PluginExecution> pluginExecutions = plugin.getExecutions();
        PluginExecution pluginExecution = pluginExecutions.stream()
                .filter(pe -> pe.getId().equals(expectedId))
                .findFirst()
                .orElse(null);

                            .map(exc -> ((PluginResolutionException) exc.getCause()).getPlugin())
                            .anyMatch(isPluginPartOfRequestScope);
                })
                .orElse(false);
    }

                        .flatMap(r -> r.getProblems().stream())
                        .filter(p -> p.getException() instanceof CycleDetectedException)
                        .findAny()
                        .orElse(null);
                if (cycle != null) {
                    throw new RuntimeException(new ProjectCycleException(
                            "The projects in the reactor contain a cyclic reference: " + cycle.getMessage(),

    // weirdness.
    public MavenProject getTopLevelProject() {
        return sortedProjects.stream()
                .filter(MavenProject::isExecutionRoot)
                .findFirst()
                .orElse(null);
    }

    public List<MavenProject> getSortedProjects() {
        return sortedProjects;
    }

    public boolean hasMultipleProjects() {
        return sortedProjects.size() > 1;
    }

                    // could not parse expression
                    return null;
            }
        }

        if (value instanceof Optional) {
            value = ((Optional<?>) value).orElse(null);
        }
        return value;
    }

    private static Object getMappedValue(
            final String expression, final int from, final int to, final Object value, final String key)

            this.topLevelProject = projects.stream()
                    .filter(project -> project.isExecutionRoot())
                    .findFirst()
                    .orElse(first);
        } else {
            this.currentProject = new ThreadLocal<>();
            this.topLevelProject = null;
        }
        this.projects = projects;
    }

                .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}.

    }

    @Override
    public org.eclipse.aether.artifact.Artifact toArtifact(Artifact artifact) {
        Path path = getService(ArtifactManager.class).getPath(artifact).orElse(null);
        if (artifact instanceof DefaultArtifact) {
            org.eclipse.aether.artifact.Artifact a = ((DefaultArtifact) artifact).getArtifact();
            if (Objects.equals(path, a.getPath())) {

            String location = f.next().location;
            ActivationFrame parent = f.next();

            return parent.parent.map(p -> p.getLocation(location)).orElse(null);
        };
        final UnaryOperator<String> transformer = s -> {
            if (hasProjectExpression(s)) {
                String path = pathSupplier.get();

            String location = f.next().location;
            ActivationFrame parent = f.next();

            return parent.parent.map(p -> p.getLocation(location)).orElse(null);
        };
        final UnaryOperator<String> transformer = s -> {
            if (hasProjectExpression(s)) {
                String path = pathSupplier.get();