return new AbstractIterator<Set<E>>() {
          final BitSet bits = new BitSet(index.size());

          @Override
          protected @Nullable Set<E> computeNext() {
            if (bits.isEmpty()) {
              bits.set(0, size);
            } else {
              int firstSetBit = bits.nextSetBit(0);
              int bitToFlip = bits.nextClearBit(firstSetBit);

errors.New("edwards25519: invalid field element input size") } // Bits 0:51 (bytes 0:8, bits 0:64, shift 0, mask 51). v.l0 = byteorder.LEUint64(x[0:8]) v.l0 &= maskLow51Bits // Bits 51:102 (bytes 6:14, bits 48:112, shift 3, mask 51). v.l1 = byteorder.LEUint64(x[6:14]) >> 3 v.l1 &= maskLow51Bits // Bits 102:153 (bytes 12:20, bits 96:160, shift 6, mask 51). v.l2 = byteorder.LEUint64(x[12:20]) >> 6 v.l2 &= maskLow51Bits // Bits 153:204 (bytes 19:27, bits 152:216, shift 1, mask 51). v.l3 = byteorder.LEUint64(x[19:27])...

            // Given: An input value
            // When: Creating NdrShort with that value
            NdrShort ndrShort = new NdrShort(inputValue);

            // Then: Value should be masked with 0xFF (lower 8 bits)
            assertEquals(inputValue & 0xFF, ndrShort.value, "Constructor should mask value with 0xFF");
        }

        @Test
        @DisplayName("Should handle zero value correctly")

   * This method does so by hashing 64 bits of the IPv6 address into {@code 224.0.0.0/3} (64 bits
   * into 29 bits):
   *
   * <ul>
   *   <li>If the IPv6 address contains an embedded IPv4 address, the function hashes that.
   *   <li>Otherwise, it hashes the upper 64 bits of the IPv6 address.
   * </ul>
   *
   * <p>A "coerced" IPv4 address is equivalent to itself.

import com.google.common.annotations.VisibleForTesting;

/**
 * Implementation of FarmHash Fingerprint64, an open-source fingerprinting algorithm for strings.
 *
 * <p>Its speed is comparable to CityHash64, and its quality of hashing is at least as good.
 *
 * <p>Note to maintainers: This implementation relies on signed arithmetic being bit-wise equivalent
 * to unsigned arithmetic in all cases except:
 *
 * <ul>

        @Test
        @DisplayName("Should indicate search bits support")
        void testIsSupportSearchBits() throws Exception {
            // Test with search bits supported
            setPrivateField(response, "supportSearchBits", true);
            assertTrue(response.isSupportSearchBits(), "Should indicate search bits support");

            // Test without search bits support

   * during which the {@code RateLimiter} smoothly ramps up its rate, until it reaches its maximum
   * rate at the end of the period (as long as there are enough requests to saturate it). Similarly,
   * if the {@code RateLimiter} is left <i>unused</i> for a duration of {@code warmupPeriod}, it
   * will gradually return to its "cold" state, i.e. it will go through the same warming up process
   * as when it was first created.

<li>
<code>R0.UXTB</code>
<br>
<code>R0.UXTB&lt;&lt;imm</code>:
<code>UXTB</code>: extract an 8-bit value from the low-order bits of <code>R0</code> and zero-extend it to the size of <code>R0</code>.
<code>R0.UXTB&lt;&lt;imm</code>: left shift the result of <code>R0.UXTB</code> by <code>imm</code> bits.
The <code>imm</code> value can be 0, 1, 2, 3, or 4.

errors.New("edwards25519: invalid field element input size") } // Bits 0:51 (bytes 0:8, bits 0:64, shift 0, mask 51). v.l0 = byteorder.LEUint64(x[0:8]) v.l0 &= maskLow51Bits // Bits 51:102 (bytes 6:14, bits 48:112, shift 3, mask 51). v.l1 = byteorder.LEUint64(x[6:14]) >> 3 v.l1 &= maskLow51Bits // Bits 102:153 (bytes 12:20, bits 96:160, shift 6, mask 51). v.l2 = byteorder.LEUint64(x[12:20]) >> 6 v.l2 &= maskLow51Bits // Bits 153:204 (bytes 19:27, bits 152:216, shift 1, mask 51). v.l3 = byteorder.LEUint64(x[19:27])...

	// MD5 checksum.
	ErrMissingCustomerKeyMD5 = Errorf("The SSE-C request is missing the customer key MD5")

	// ErrInvalidCustomerKey indicates that the SSE-C client key is not valid - e.g. not a
	// base64-encoded string or not 256 bits long.
	ErrInvalidCustomerKey = Errorf("The SSE-C client key is invalid")

	// ErrSecretKeyMismatch indicates that the provided secret key (SSE-C client key / SSE-S3 KMS key)