}
  }

  @Override
  public boolean contains(@Nullable Object obj) {
    if (!(obj instanceof EndpointPair)) {
      return false;
    }
    EndpointPair<?> endpointPair = (EndpointPair<?>) obj;

    if (graph.isDirected()) {
      if (!endpointPair.isOrdered()) {
        return false;
      }

      Object source = endpointPair.source();
      Object target = endpointPair.target();

  // Always equal is a valid total ordering. And it works for any Object.
  private static final class AlwaysEqual extends Ordering<@Nullable Object>
      implements Serializable {
    private static final AlwaysEqual INSTANCE = new AlwaysEqual();

    @Override
    @SuppressWarnings("UnusedVariable") // intentionally weird Comparator
    public int compare(@Nullable Object o1, @Nullable Object o2) {
      return 0;
    }

    @Override

    }
    return hash;
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    if (obj instanceof PairwiseEquivalence) {
      @SuppressWarnings("unchecked")
      PairwiseEquivalence<Object, Object> that = (PairwiseEquivalence<Object, Object>) obj;
      return this.elementEquivalence.equals(that.elementEquivalence);
    }

    return false;
  }

  @Override

## ✨ Features

### Core Utilities
- **Bean Manipulation** (`org.codelibs.core.beans`) - JavaBeans metadata handling, property access, and object conversion with comprehensive `BeanDesc` system
- **Type Conversion** (`org.codelibs.core.convert`) - Comprehensive utilities for converting between Java types with null-safe operations and support for all primitive types

     * @return a new CurlRequest object configured with the PUT method and the specified URL
     */
    public static CurlRequest put(final String url) {
        return new CurlRequest(Method.PUT, url);
    }

    /**
     * Creates a new CurlRequest with the DELETE method for the specified URL.
     *
     * @param url the URL to which the DELETE request will be sent

  }

  public void testStrong_builder() {
    int concurrencyLevel = 42;
    Interner<Object> interner =
        Interners.newBuilder().strong().concurrencyLevel(concurrencyLevel).build();
    InternerImpl<Object> internerImpl = (InternerImpl<Object>) interner;
    assertEquals(Strength.STRONG, internerImpl.map.keyStrength());
  }

  public void testWeak_simplistic() {

 * the backing object, but relies on {@code Object}'s implementation. This is necessary to preserve
 * the symmetry of {@code equals}. Custom definitions of equality are usually based on an interface,
 * such as {@code Set} or {@code List}, so that the implementation of {@code equals} can cast the
 * object being tested for equality to the custom interface. {@code ForwardingObject} implements no

     *       object associated with our thread, because if it was the publication wouldn't have been
     *       unsafe and we'd have seen our thread as the value. This state is also why a new
     *       ThreadConfinedTaskQueue object must be created for each inline execution, because
     *       observing a null thread does not mean the object is safe to reuse.

        setAvailable_GreaterThan(available, null);
    }

    public void setAvailable_GreaterThan(Boolean available, ConditionOptionCall<RangeQueryBuilder> opLambda) {
        final Object _value = available;
        RangeQueryBuilder builder = regRangeQ("available", ConditionKey.CK_GREATER_THAN, _value);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

  }

  /**
   * Asserts that the given object is non-null, with a better failure message than {@link
   * TestCase#assertNull(String, Object)}.
   *
   * <p>The {@link TestCase} version (which is from JUnit 3) produces a failure message that does
   * not include the value of the object.
   *
   * @since 33.4.0
   */
  public static void assertNull(String message, Object object) {
    assertEquals(message, null, object);
  }