@GwtIncompatible // CopyOnWriteArrayList
  public static <E extends @Nullable Object> CopyOnWriteArrayList<E> newCopyOnWriteArrayList(
      Iterable<? extends E> elements) {
    // We copy elements to an ArrayList first, rather than incurring the
    // quadratic cost of adding them to the COWAL directly.
    Collection<? extends E> elementsCollection =
        (elements instanceof Collection)
            ? (Collection<? extends E>) elements

import java.util.Map;
import java.util.Map.Entry;
import org.jspecify.annotations.NullMarked;

/**
 * Generators of different types of map and related collections, such as keys, entries and values.
 *
 * @author Hayward Chan
 */
@GwtCompatible
@NullMarked
public class MapGenerators {
  public static class ImmutableMapGenerator extends TestStringMapGenerator {
    @Override

        multiset2.add("equalIn1");
        multiset2.add("fewerIn1", 3);
        multiset2.add("onlyIn2", 2);
        for (int i = 0; i < elements.length; i++) {
          // add 1 more copy of each element to multiset1 than multiset2
          multiset1.add(elements[i], i + 2);
          multiset2.add(elements[i], i + 1);
        }
        return difference(multiset1, multiset2);
      }
    };
  }

        });
    assertTrue(map.isEmpty());
  }

  // ----------------------------------------------------------------
  // Test that interrupts result in RuntimeException, not InterruptedException.
  // Trickier than it looks, because runFinalization swallows interrupts.
  // ----------------------------------------------------------------

  class Interruptenator extends Thread {
    final AtomicBoolean shutdown;

   * interned, thus preventing these instances from being garbage-collected. If this retention is
   * acceptable, this implementation may perform better than {@link #newWeakInterner}.
   */
  public static <E> Interner<E> newStrongInterner() {
    return newBuilder().strong().build();
  }

  /**

import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import org.jspecify.annotations.Nullable;

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * @author Hayward Chan
 */
@GwtCompatible
final class Platform {

  /** Returns the platform preferred implementation of a map based on a hash table. */
  static <K extends @Nullable Object, V extends @Nullable Object>

        @Test
        @DisplayName("Should throw exception when stripping more than consumed")
        void testStripMoreThanConsumed() {
            setupReferralDataWithPathConsumed(5);

            IllegalArgumentException exception = assertThrows(IllegalArgumentException.class, () -> referralData.stripPathConsumed(10));
            assertEquals("Stripping more than consumed", exception.getMessage());
        }

        withLock {
          finished = this.finished
          flowControlError = remainingByteCount + readBuffer.size > maxByteCount
        }

        // If the peer sends more data than we can handle, discard it and close the connection.
        if (flowControlError) {
          source.skip(remainingByteCount)
          closeLater(ErrorCode.FLOW_CONTROL_ERROR)
          return
        }

    assertEquals(
        "Modifying the builder should not have changed any already built sets",
        216,
        webSafeColors.size());
    assertEquals("the new array should be one bigger than webSafeColors", 217, addedColor.size());
    Integer[] appendColorArray = addedColor.toArray(new Integer[addedColor.size()]);
    assertEquals(0x00BFFF, (int) appendColorArray[216]);
  }

     * and Joiner.on(...).useForNull(...) both declare the same return type: plain Joiner. To ensure
     * that users *can* pass null arguments to Joiner, we annotate it as if it always tolerates null
     * inputs, rather than as if it never tolerates them.
     *
     * We rely on checkers to implement special cases to catch dangerous calls to join(), etc. based
     * on what they know about the particular Joiner instances the calls are performed on.