assertThat(union(emptySet(), emptySet()).immutableCopy()).isEmpty();
    assertThat(intersection(newHashSet(1, 2), newHashSet(3, 4)).immutableCopy()).isEmpty();
    assertThat(difference(newHashSet(1, 2), newHashSet(1, 2)).immutableCopy()).isEmpty();
    assertThat(symmetricDifference(newHashSet(1, 2), newHashSet(1, 2)).immutableCopy()).isEmpty();
  }

  public void testImmutableCopy() {

 */
@file:Suppress(
  "INVISIBLE_REFERENCE",
)

package okhttp3.brotli

import assertk.assertThat
import assertk.assertions.contains
import assertk.assertions.hasMessage
import assertk.assertions.isEmpty
import assertk.assertions.isEqualTo
import java.io.IOException
import kotlin.test.assertFailsWith
import okhttp3.CompressionInterceptor
import okhttp3.Gzip
import okhttp3.MediaType.Companion.toMediaType

    assertFalse(multimap.containsValue(1));
    assertFalse(multimap.containsEntry("foo", 1));
    assertTrue(multimap.entries().isEmpty());
    assertTrue(multimap.equals(ArrayListMultimap.create()));
    assertEquals(emptyList(), multimap.get("foo"));
    assertEquals(0, multimap.hashCode());
    assertTrue(multimap.isEmpty());
    assertEquals(HashMultiset.create(), multimap.keys());
    assertEquals(emptySet(), multimap.keySet());

            projectKeys.add(key);
        }
        return projectKeys;
    }

    public boolean isEmpty() {
        return items.isEmpty();
    }

    /**
     * @return a set of all the projects managed by the build
     */
    public Set<MavenProject> getProjects() {

      return new StandardElementSet();
    }

    @Override
    public Iterator<T> iterator() {
      return standardIterator();
    }

    @Override
    public boolean isEmpty() {
      return standardIsEmpty();
    }

    @Override
    public int size() {
      return standardSize();
    }
  }

  @AndroidIncompatible // test-suite builders

        StringBuilder buffer = new StringBuilder(256);

        if (!getSource().isEmpty()) {
            if (!buffer.isEmpty()) {
                buffer.append(", ");
            }
            buffer.append(getSource());
        }

        if (getLineNumber() > 0) {
            if (!buffer.isEmpty()) {
                buffer.append(", ");
            }

      this.function = checkNotNull(function);
    }

    @Override
    public void clear() {
      fromCollection.clear();
    }

    @Override
    public boolean isEmpty() {
      return fromCollection.isEmpty();
    }

    @Override
    public Iterator<T> iterator() {
      return Iterators.transform(fromCollection.iterator(), function);
    }

    @Override
    public int size() {

  public UnmodifiableIterator<C> descendingIterator() {
    return emptyIterator();
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  public boolean isEmpty() {
    return true;
  }

  @Override
  public ImmutableList<C> asList() {
    return ImmutableList.of();
  }

  @Override
  public String toString() {
    return "[]";
  }

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3

import assertk.assertThat
import assertk.assertions.isEmpty
import assertk.assertions.isEqualTo
import kotlin.test.assertFailsWith
import okhttp3.ResponseBody.Companion.asResponseBody
import okhttp3.ResponseBody.Companion.toResponseBody
import okio.Buffer

      collection = ((ImmutableEnumSet<?>) collection).delegate;
    }
    return delegate.containsAll(collection);
  }

  @Override
  public boolean isEmpty() {
    return delegate.isEmpty();
  }

  @Override
  public boolean equals(@Nullable Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof ImmutableEnumSet) {