* common functionality into the superclass and read wordCount
     * and byteCount worth of data.
     *
     * We will still use the readXxxWireFormat return values to
     * indicate how many bytes(note: readParameterWordsWireFormat
     * returns bytes read and not the number of words(but the
     * wordCount member DOES store the number of words)) we

     */
    public QueryHelper() {
        // Default constructor
    }

    /** Logger for this class */
    private static final Logger logger = LogManager.getLogger(QueryHelper.class);

    /** Constant used to indicate that query-based preference should be used for search routing */
    protected static final String PREFERENCE_QUERY = "_query";

    /** Prefix used to identify sort parameters in search queries */

	formats := make([]*formatErasureV3, 16)

	for j := range 16 {
		newFormat := format.Clone()
		newFormat.Erasure.This = format.Erasure.Sets[0][j]
		formats[j] = newFormat
	}

	// empty format to indicate disk not found, but this
	// empty should return false.
	formats[0] = nil

	if ok := formatErasureV3ThisEmpty(formats); ok {
		t.Fatalf("expected value false, got %t", ok)
	}

	formats[2].Erasure.This = ""

 *     source-compatible</a> since 4.0)
 */
@GwtCompatible
/*
 * The type parameter is <T> rather than <T extends @Nullable> so that we can use T in the
 * doEquivalent and doHash methods to indicate that the parameter cannot be null.
 */
@SuppressWarnings("UngroupedOverloads")
public abstract class Equivalence<T> {
  /** Constructor for use by subclasses. */
  protected Equivalence() {}

  /**

      this.a = a;
      this.b = b;
    }
  }

  /**
   * Returns a stream consisting of the results of applying the given function to the elements of
   * {@code stream} and their indices in the stream. For example,
   *
   * {@snippet :
   * mapWithIndex(
   *     Stream.of("a", "b", "c"),
   *     (e, index) -> index + ":" + e)
   * }
   *

    // (2) "Dolphin". If we're rotating an array a of size n by a distance of d, then element a[0]
    //     ends up at a[d], which in turn ends up at a[2d], and so on until we get back to a[0].
    //     (All indices taken mod n.) If d and n are mutually prime, all elements will have been
    //     moved at that point. Otherwise, we can rotate the cycle a[1], a[1 + d], a[1 + 2d], etc,

  // If the `next` bits in `entries[i]` are 0 that means there are no further entries for the given
  // short hash. But 0 is also a valid index in `entries`, so we add 1 to these indices before
  // putting them in `table` or in `next` bits, and subtract 1 again when we need an index value.
  //
  // The elements of `keys`, `values`, and `entries` are added sequentially, so that elements 0 to

			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusOK,
			shouldPass:         true,
		},
		// Test case - 9.
		// Setting Invalid AccessKey and SecretKey to induce and verify Signature Mismatch error.
		{
			bucket:             bucketName,
			prefix:             "",
			keyMarker:          "",
			uploadIDMarker:     "",
			delimiter:          "",

     */
    long guess = (long) Math.sqrt((double) x);
    // Note: guess is always <= FLOOR_SQRT_MAX_LONG.
    long guessSquared = guess * guess;
    // Note (2013-2-26): benchmarks indicate that, inscrutably enough, using if statements is
    // faster here than using lessThanBranchFree.
    switch (mode) {
      case UNNECESSARY:
        checkRoundingUnnecessary(guessSquared == x);
        return guess;

					write([]byte(err.Error()))
				} else {
					write([]byte{0})
				}
				return
			}
		}
	}()
	return func(err error) {
		if doneCh == nil {
			return
		}

		// Indicate we are ready to write.
		doneCh <- err

		// Wait for channel to be closed so we don't race on writes.
		<-doneCh

		// Clear so we can be called multiple times without crashing.
		doneCh = nil