other.add(e0());
    assertFalse("multiset equals a multiset with a different size", getMultiset().equals(other));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testEquals_differentElements() {
    Multiset<E> other = HashMultiset.create(getSampleElements());
    other.remove(e0());
    other.add(e3());
    assertFalse("multiset equals a multiset with different elements", getMultiset().equals(other));
  }

### `response_model` or Return Type { #response-model-or-return-type }

In this case, because the two models are different, if we annotated the function return type as `UserOut`, the editor and tools would complain that we are returning an invalid type, as those are different classes.

That's why in this example we have to declare it in the `response_model` parameter.

            assertTrue(consistentRequest.isSigningEnforced(), "Implementation should consistently return the same value");
        }
    }

    @Test
    @DisplayName("Test different implementations can have different behaviors")
    void testDifferentImplementations() {
        // Given
        SmbNegotiationRequest enforcedRequest = new TestSmbNegotiationRequest(true);

            assertNotNull(cryptographer);
            assertSame(oneWayCryptographer, cryptographer);
        }
    }

    // Test with different cipher types
    @Test
    public void test_withBlowfishCipher() {
        // Test with Blowfish cipher
        InvertibleCryptographer blowfish = InvertibleCryptographer.createBlowfishCipher("secretkey");

        // When: Request with different port
        SmbTransportImpl second = testPool.getSmbTransport(ctx, address, 139, false);

        // Then: Should create new connection for different port
        assertNotSame(first, second, "Should create new connection for different port");
    }

    @Test

    void testConsistentBytesRead() throws SMBProtocolDecodingException {
        // Given - 10 different valid buffers
        for (int i = 0; i < 10; i++) {
            byte[] buffer = new byte[256];
            SMBUtil.writeInt2(4, buffer, i * 10);
            SMBUtil.writeInt2(i, buffer, i * 10 + 2); // Different reserved values

            // When
            int bytesRead = response.readBytesWireFormat(buffer, i * 10);

 * com.google.common.collect.testing.FeatureSpecificTestSuiteBuilder#withFeatures(Feature...)}),
 * this annotation specifies each of the different sizes for which a test suite should be built. (In
 * a typical case, the features should include {@link CollectionSize#ANY}.) These semantics are thus
 * a little different from those of other Collection-related features such as {@link
 * CollectionFeature} or {@link SetFeature}.
 *

 * com.google.common.collect.testing.FeatureSpecificTestSuiteBuilder#withFeatures(Feature...)}),
 * this annotation specifies each of the different sizes for which a test suite should be built. (In
 * a typical case, the features should include {@link CollectionSize#ANY}.) These semantics are thus
 * a little different from those of other Collection-related features such as {@link
 * CollectionFeature} or {@link SetFeature}.
 *

        assertEquals("000000FF", Hexdump.toHexString(255, 8));
        assertEquals("00001000", Hexdump.toHexString(4096, 8));
        assertEquals("FFFFFFFF", Hexdump.toHexString(-1, 8));

        // Test different sizes
        assertEquals("00", Hexdump.toHexString(0, 2));
        assertEquals("FF", Hexdump.toHexString(255, 2));
        assertEquals("1234", Hexdump.toHexString(0x1234, 4));
    }

    @Test

And there are many other images for different things like databases, for example for:

* [PostgreSQL](https://hub.docker.com/_/postgres)
* [MySQL](https://hub.docker.com/_/mysql)
* [MongoDB](https://hub.docker.com/_/mongo)
* [Redis](https://hub.docker.com/_/redis), etc.