private ProtoLookup(Map<Class<?>, Object> components) {
        this.components = components;
    }

    @Override
    public <T> T lookup(Class<T> type) {
        Optional<T> optional = lookupOptional(type);
        if (optional.isPresent()) {
            return optional.get();
        } else {
            throw new LookupException("No mapping for key: " + type.getName());
        }
    }

    @Override

    /**
     * Performs a lookup for optional typed component.
     *
     * @param type The component type.
     * @return Optional carrying component or empty optional if no such component.
     * @param <T> The component type.
     * @throws LookupException if there is some provisioning related issue.
     */
    @Nonnull
    <T> Optional<T> lookupOptional(Class<T> type);

    /**

    scope: Optional string. Several scopes (each one a string) separated by spaces. E.g.
        "items:read items:write users:read profile openid"
    client_id: optional string. OAuth2 recommends sending the client_id and client_secret (if any)
        using HTTP Basic auth, as: client_id:client_secret
    client_secret: optional string. OAuth2 recommends sending the client_id and client_secret (if any)

  // +optional
  optional string status = 6;

  // brief reason for the request state
  // +optional
  optional string reason = 2;

  // human readable message with details about the request state
  // +optional
  optional string message = 3;

  // timestamp for the last update to this condition
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.Time lastUpdateTime = 4;

     * Should the build continue if the target is not present?
     */
    final boolean optional;

    ActivationSettings(final boolean active, final boolean optional) {
        this.active = active;
        this.optional = optional;
    }

    static ActivationSettings of(final boolean active, final boolean optional) {
        if (optional) {
            return active ? ACTIVATION_OPTIONAL : DEACTIVATION_OPTIONAL;
        } else {

  // +optional
  optional UserSubject user = 2;

  // `group` matches based on user group name.
  // +optional
  optional GroupSubject group = 3;

  // `serviceAccount` matches ServiceAccounts.
  // +optional
  optional ServiceAccountSubject serviceAccount = 4;
}

// UserSubject holds detailed information for user-kind subject.
message UserSubject {

  // +optional
  optional UserSubject user = 2;

  // `group` matches based on user group name.
  // +optional
  optional GroupSubject group = 3;

  // `serviceAccount` matches ServiceAccounts.
  // +optional
  optional ServiceAccountSubject serviceAccount = 4;
}

// UserSubject holds detailed information for user-kind subject.
message UserSubject {

     *
     * @return an {@link Optional} containing the output stream, or empty if not applicable
     */
    @Nonnull
    Optional<OutputStream> out();

    /**
     * Returns the error stream for the Maven execution, if running in embedded mode.
     *
     * @return an {@link Optional} containing the error stream, or empty if not applicable
     */
    @Nonnull
    Optional<OutputStream> err();

    /**

			Key:         apiRequestsMax,
			Description: `set the maximum number of concurrent requests (default: auto)`,
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         apiClusterDeadline,
			Description: `set the deadline for cluster readiness check` + defaultHelpPostfix(apiClusterDeadline),
			Optional:    true,
			Type:        "duration",
		},
		config.HelpKV{
			Key:         apiCorsAllowOrigin,

   *
   * <p><b>Java 9 users:</b> use {@code optional.stream()} instead.
   */
  @Beta
  @InlineMe(replacement = "optional.stream()")
  @InlineMeValidationDisabled("Java 9+ API only")
  public static <T> Stream<T> stream(java.util.Optional<T> optional) {
    return optional.isPresent() ? Stream.of(optional.get()) : Stream.empty();
  }

  /**
   * If a value is present in {@code optional}, returns a stream containing only that element,