*/
  @CheckForNull private transient int[] predecessor;

  /**
   * Pointer to the successor of an entry in insertion order. ENDPOINT indicates a node is the last
   * node in insertion order; all values at indices ≥ {@link #size()} are UNSET.
   */
  @CheckForNull private transient int[] successor;

  /** Pointer to the first node in the linked list, or {@code ENDPOINT} if there are no entries. */

    }
  }

  private static <T extends @Nullable Object> void successor(AvlNode<T> a, AvlNode<T> b) {
    a.succ = b;
    b.pred = a;
  }

  private static <T extends @Nullable Object> void successor(
      AvlNode<T> a, AvlNode<T> b, AvlNode<T> c) {
    successor(a, b);
    successor(b, c);
  }

  /*

    }
  }

  private static <T extends @Nullable Object> void successor(AvlNode<T> a, AvlNode<T> b) {
    a.succ = b;
    b.pred = a;
  }

  private static <T extends @Nullable Object> void successor(
      AvlNode<T> a, AvlNode<T> b, AvlNode<T> c) {
    successor(a, b);
    successor(b, c);
  }

  /*

			if ok1 != ok2 {
				t.Errorf("Expected %s, got %s", test.expectedErr, err)
			}
			if test.succmodTimes != nil {
				if !test.expectedSuccModTime.Equal(fi.SuccessorModTime) {
					t.Errorf("Expected successor mod time to be %v but got %v", test.expectedSuccModTime, fi.SuccessorModTime)
				}
				if test.expectedIsLatest != fi.IsLatest {
					t.Errorf("Expected IsLatest to be %v but got %v", test.expectedIsLatest, fi.IsLatest)

	replicationDecision string // internal representation of replication decision for use by DeleteObject handler
	// The total count of all versions of this object
	NumVersions int
	//  The modtime of the successor object version if any
	SuccessorModTime time.Time

	// Checksums added on upload.
	// Encoded, maybe encrypted.
	Checksum []byte

	// Inlined
	Inlined bool

	DataBlocks   int

	}

	// objProps represents properties that go beyond a single version
	type objProps struct {
		succModTime time.Time
		numVersions int
	}
	// Find the successor mod time and numVersions in quorum, otherwise leave the
	// candidate as found
	otherPropsMap := make(counterMap[objProps])
	var candidate FileInfo
	var found bool
	for i, hash := range metaHashes {

Then APIStar stopped to exist as a server and Starlette was created, and was a new better foundation for such a system. That was the final inspiration to build **FastAPI**.

I consider **FastAPI** a "spiritual successor" to APIStar, while improving and increasing the features, typing system, and other parts, based on the learnings from all these previous tools.

///

## Used by **FastAPI**

/**
 * A builder of {@link LoadingCache} and {@link Cache} instances.
 *
 * <h2>Prefer <a href="https://github.com/ben-manes/caffeine/wiki">Caffeine</a> over Guava's caching
 * API</h2>
 *
 * <p>The successor to Guava's caching API is <a
 * href="https://github.com/ben-manes/caffeine/wiki">Caffeine</a>. Its API is designed to make it a
 * nearly drop-in replacement. It requires Java 8+, and is not available for Android or GWT/J2CL,

/**
 * A builder of {@link LoadingCache} and {@link Cache} instances.
 *
 * <h2>Prefer <a href="https://github.com/ben-manes/caffeine/wiki">Caffeine</a> over Guava's caching
 * API</h2>
 *
 * <p>The successor to Guava's caching API is <a
 * href="https://github.com/ben-manes/caffeine/wiki">Caffeine</a>. Its API is designed to make it a
 * nearly drop-in replacement. It requires Java 8+, and is not available for Android or GWT/J2CL,

     European Parliament and of the Council of 11 March 1996 on the legal
     protection of databases, and under any national implementation
     thereof, including any amended or successor version of such
     directive); and
vii. other similar, equivalent or corresponding rights throughout the
     world based on applicable law or treaty, and any national
     implementations thereof.