*/
    @Nonnull
    Map<String, String> userProperties();

    /**
     * Returns a map of system properties for the Maven execution.
     * These include both Java system properties and Maven-specific system properties.
     *
     * @return an unmodifiable map of system properties
     */
    @Nonnull
    Map<String, String> systemProperties();

    /**

        // can be read from the cache.
        System.out.println("Force cache: true");
        clientForCall = client.newBuilder()
            .addNetworkInterceptor(REWRITE_CACHE_CONTROL_INTERCEPTOR)
            .build();
      } else {
        System.out.println("Force cache: false");
        clientForCall = client;
      }

message ScaleIOPersistentVolumeSource {
  // gateway is the host address of the ScaleIO API Gateway.
  optional string gateway = 1;

  // system is the name of the storage system as configured in ScaleIO.
  optional string system = 2;

  // secretRef references to the secret for ScaleIO user and other
  // sensitive information. If this is not provided, Login operation will fail.

Your code needs to run on [all versions of Java that Gradle supports](platforms/documentation/docs/src/docs/userguide/releases/compatibility.adoc) and across all supported operating systems (macOS, Windows, Linux). The [Gradle CI system](http://builds.gradle.org/) will verify this, but here are some pointers that will avoid surprises:

    void setUp() {
        cli = new MavenCli();
        origBasedir = System.getProperty(MavenCli.MULTIMODULE_PROJECT_DIRECTORY);
    }

    @AfterEach
    void tearDown() throws Exception {
        if (origBasedir != null) {
            System.setProperty(MavenCli.MULTIMODULE_PROJECT_DIRECTORY, origBasedir);
        } else {
            System.getProperties().remove(MavenCli.MULTIMODULE_PROJECT_DIRECTORY);
        }
    }

  @Override public synchronized void onOpen(WebSocket webSocket, Response response) {
    System.out.println("onOpen: " + response);
  }

  // TOOD(jwilson): decode incoming messages and dispatch them somewhere.
  @Override public void onMessage(WebSocket webSocket, String text) {
    System.out.println("onMessage: " + text);
  }

  @Override public void onClosing(WebSocket webSocket, int code, String reason) {

     */
    public static final String PATH_SEPARATOR = System.getProperty("path.separator");

    /**
     * <code>os.name</code> システムプロパティ。例:<code>Mac OS X</code>
     */
    public static final String OS_NAME = System.getProperty("os.name");

    /**
     * <code>java.io.tmpdir</code> システムプロパティ。例：/tmp
     */
    public static final String JAVA_IO_TMPDIR = System.getProperty("java.io.tmpdir");

    /**

        ArtifactResult artifactResult = system.resolveArtifact(session, artifactRequest);
        checkArtifactResult(artifactResult, "artifact-1.0.jar");

        artifact = new DefaultArtifact("ut.simple:artifact:zip:1.0");
        artifactRequest.setArtifact(artifact);
        artifactResult = system.resolveArtifact(session, artifactRequest);

                Collections.singletonList(system),
                nonTransitiveDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_MAIN_COMPILE_PLUS_RUNTIME,
                InternalScopeManager.Mode.ELIMINATE,
                byProjectPath(CommonBuilds.PROJECT_PATH_MAIN),
                Collections.singletonList(system),
                nonTransitiveDependencyScopes));

        accessResult1.setContentLength(Long.valueOf(10));
        accessResult1.setCreateTime(System.currentTimeMillis());
        accessResult1.setExecutionTime(10);
        accessResult1.setHttpStatusCode(200);
        accessResult1.setLastModified(System.currentTimeMillis());
        accessResult1.setMethod("GET");
        accessResult1.setMimeType("text/plain");