* A word about using {@link Equivalence}, which automatically checks for {@code null} and
   * identical inputs: This sounds like it ought to be a problem here, since the goals of this class
   * include testing that {@code equals()} is reflexive and is tolerant of {@code null}. However,
   * there's no problem. The reason: {@link EqualsTester} tests {@code null} and identical inputs
   * directly against {@code equals()} rather than through the {@code Equivalence}.

    }

    // Demonstrates observed equals() asymmetry when this is shorter than argument
    @Test
    @DisplayName("equals: this shorter but same prefix -> true (observed behavior)")
    void equals_thisShorterSamePrefix_true_dueToImplementation() {
        // Arrange: left shorter than right but with identical prefix

  }

  /**
   * Appends the string representation of each of {@code parts}, using the previously configured
   * separator between each, to {@code builder}. Identical to {@link #appendTo(Appendable,
   * Iterable)}, except that it does not throw {@link IOException}.
   */
  @CanIgnoreReturnValue
  public final StringBuilder appendTo(StringBuilder builder, Iterable<?> parts) {

     * for this session, the result will be cached and subsequent identical requests will return the cached
     * value without re-executing the supplier.
     * <p>
     * The caching behavior is determined by the cache retention specified in the request's metadata.
     * If an error occurs during execution, it will be cached and re-thrown for subsequent identical requests.
     *
     * @param <REQ> The request type

    }

    /**
     * Finish building an instance which also maps {@code x = x2} to {@code y = y2}. These values
     * must not both be identical to the values given in the first mapping. If only the {@code x}
     * values are identical, the transformation is vertical. If only the {@code y} values are
     * identical, the transformation is horizontal (i.e. the slope is zero).
     */
    public LinearTransformation and(double x2, double y2) {

  }

  /**
   * Serializes and deserializes the specified object and verifies that the re-serialized object is
   * equal to the provided object, that the hashcodes are identical, and that the class of the
   * re-serialized object is identical to that of the original.
   *
   * <p><b>GWT warning:</b> Under GWT, this method simply returns its input, as proper GWT

import java.util.Collection;
import java.util.Set;
import org.jspecify.annotations.NullUnmarked;

/**
 * Variant of {@link SerializableTester} that does not require the reserialized object's class to be
 * identical to the original.
 *
 * @author Chris Povirk
 */
/*
 * The whole thing is really @GwtIncompatible, but GwtJUnitConvertedTestModule doesn't have a

    /**
     * The "multipart/alternative" type is syntactically identical to "multipart/mixed", but the
     * semantics are different. In particular, each of the body parts is an "alternative" version of
     * the same information.
     */
    @JvmField
    val ALTERNATIVE = "multipart/alternative".toMediaType()

    /**
     * This type is syntactically identical to "multipart/mixed", but the semantics are different.

	// DNS name.
	TargetStrip int `json:"targetstrip,omitempty"`

	// Group is used to group (or *not* to group) different services
	// together. Services with an identical Group are returned in
	// the same answer.
	Group string `json:"group,omitempty"`

	// Key carries the original key used during Put().
	Key string `json:"-"`

            assertArrayEquals(firstEncoding, secondEncoding, "First and second encoding should be identical");
            assertArrayEquals(secondEncoding, thirdEncoding, "Second and third encoding should be identical");

            // Verify content preservation
            assertArrayEquals(mechs, parsed2.getMechanisms());
            assertEquals(flags, parsed2.getContextFlags());