this.version = version;
        this.hashCode = Objects.hash(groupId, artifactId, version);
    }

    public String getGroupId() {
        return groupId;
    }

    public String getArtifactId() {
        return artifactId;
    }

    public String getVersion() {
        return version;
    }

    @Override
    public int hashCode() {
        return hashCode;
    }

    @Override

    // Might be nice (eventually) to have:
    //     assertEquals(c1, c2);

    // But for now, settle for this:
    assertEquals(c1.hashCode(), c2.hashCode());

    assertEquals(c1.apply(1.0f), c2.apply(1.0f));
    assertEquals(c1.apply(5.0f), c2.apply(5.0f));
  }

  public void testComposeOfPredicateAndFunctionIsAssociative() {

        } else {
            return super.equals(obj);
        }
    }

    @Override
    public int hashCode() {
        if (metadata == null) {
            return super.hashCode();
        }

        return metadata.toString().hashCode();
    }

              @Override
              public Set<Entry<String, String>> entrySet() {
                return new EntrySet();
              }

              @Override
              public int hashCode() {
                return map.hashCode();
              }

              @Override
              public boolean equals(@Nullable Object o) {
                return map.equals(o);
              }

              @Override

    public StringSource(CharSequence content, String location) {
        this.content = (content != null) ? content.toString() : "";
        this.location = (location != null) ? location : "(memory)";
        this.hashCode = this.content.hashCode();
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
    }

    @Override

            this.version = version;
            this.tag = tag;

            int h = 17;
            h = h * 31 + this.groupId.hashCode();
            h = h * 31 + this.artifactId.hashCode();
            h = h * 31 + this.version.hashCode();
            h = h * 31 + this.tag.hashCode();
            hash = h;
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj) {

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Tests {@code Prerequisites}.
 *
 */
class PrerequisitesTest {

    @Test
    void testHashCodeNullSafe() {
        new Prerequisites().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Prerequisites().equals(null));

        new Prerequisites().equals(new Prerequisites());
    }

    @Test

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Tests {@code Site}.
 *
 */
class SiteTest {

    @Test
    void testHashCodeNullSafe() {
        new Site().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Site().equals(null));

        new Site().equals(new Site());
    }

    @Test
    void testEqualsIdentity() {

/**
 * Tests {@code ActivationProperty}.
 *
 */
class ActivationPropertyTest {

    @Test
    void testHashCodeNullSafe() {
        new ActivationProperty().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new ActivationProperty().equals(null));

        new ActivationProperty().equals(new ActivationProperty());
    }

    @Test

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Tests {@code Developer}.
 *
 */
class DeveloperTest {

    @Test
    void testHashCodeNullSafe() {
        new Developer().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Developer().equals(null));

        new Developer().equals(new Developer());
    }

    @Test