public String toString() {
      return "IncompatibleKeyType";
    }
  }

  protected final boolean supportsPut;
  protected final boolean supportsRemove;
  protected final boolean supportsClear;
  protected final boolean allowsNullKeys;
  protected final boolean allowsNullValues;
  protected final boolean supportsIteratorRemove;

  /**
   * Creates a new, empty instance of the class under test.
   *

    @SuppressWarnings("EqualsHashCode")
    @Override
    public boolean equals(@Nullable Object other) {
      return (other instanceof ClassWhichIsAlwaysEqualButHasDifferentHashcodes);
    }
  }

  private static class ObjectWhichIsEqualButChangesClass implements Serializable {
    private static final long serialVersionUID = 1L;

    @Override
    public boolean equals(@Nullable Object other) {

    @SuppressWarnings("EqualsHashCode")
    @Override
    public boolean equals(@Nullable Object other) {
      return (other instanceof ClassWhichIsAlwaysEqualButHasDifferentHashcodes);
    }
  }

  private static class ObjectWhichIsEqualButChangesClass implements Serializable {
    private static final long serialVersionUID = 1L;

    @Override
    public boolean equals(@Nullable Object other) {

     */
    boolean isOffline();

    /**
     * Enables/disables network access to remote repositories.
     *
     * @param offline {@code true} to disable remote access, {@code false} to allow network access.
     * @return This request, never {@code null}.
     */
    RepositoryRequest setOffline(boolean offline);

    /**

    private final List<MavenProject> sortedProjects;

    private final Map<Key, List<MavenProject>> cache = new ConcurrentHashMap<>();

    private record Key(MavenProject project, boolean transitive, boolean upstream) {}

    /**
     * Creates a new project dependency graph from the specified graph.
     *

    }

    /** {@inheritDoc} */
    @Override
    public boolean isSnapshot() {
        return artifact.isSnapshot();
    }

    /** {@inheritDoc} */
    @Override
    public int compareTo(Artifact a) {
        return artifact.compareTo(a);
    }

    /** {@inheritDoc} */
    @Override
    public void setResolved(boolean resolved) {
        artifact.setResolved(resolved);
    }

    public boolean equals(@Nullable Object obj) {
      if (obj instanceof SameCharacterInstance) {
        SameCharacterInstance that = (SameCharacterInstance) obj;
        return i == that.i;
      }
      return false;
    }
  }

  static class SameBooleanInstance {
    private final Boolean i;

    public SameBooleanInstance(Boolean i) {
      this.i = checkNotNull(i);
    }

        return t;
    });
    private volatile boolean asyncLogging = true;
    private volatile boolean shutdown = false;

    // Event statistics
    private final Map<EventType, AtomicLong> eventCounters = new ConcurrentHashMap<>();
    private final Map<EventType, AtomicLong> eventTimings = new ConcurrentHashMap<>();

    // Configuration
    private volatile boolean enableJsonLogging = true;

     */
    ALWAYS_TRUE {
      @Override
      public boolean apply(@Nullable Object o) {
        return true;
      }

      @Override
      public String toString() {
        return "Predicates.alwaysTrue()";
      }
    },
    /**
     * @see Predicates#alwaysFalse()
     */
    ALWAYS_FALSE {
      @Override
      public boolean apply(@Nullable Object o) {
        return false;
      }

          }
        }
      }
      return false;
    }
  }

  private boolean isExpired(Timestamped<V> stamped) {
    if ((expireAfterAccess == UNSET_INT) && (expireAfterWrite == UNSET_INT)) {
      return false;
    }

    boolean expireWrite = stamped.getWriteTimestamp() + expireAfterWrite <= currentTimeNanos();
    boolean expireAccess = stamped.getAccessTimestamp() + expireAfterAccess <= currentTimeNanos();