/**
 * GWt emulation of {@link RegularImmutableMap}.
 *
 * @author Hayward Chan
 */
final class RegularImmutableMap<K, V> extends ForwardingImmutableMap<K, V> {

  static final ImmutableMap<Object, Object> EMPTY = new RegularImmutableMap<Object, Object>();

  RegularImmutableMap(Map<? extends K, ? extends V> delegate) {
    super(delegate);
  }

  RegularImmutableMap(Entry<? extends K, ? extends V>... entries) {

  private final transient ImmutableBiMap<V, K> inverse;

  @SuppressWarnings("unchecked") // used only for the empty map, which works for any types
  RegularImmutableBiMap() {
    super(new RegularImmutableMap<K, V>(new HashMap<K, V>()));
    this.inverse = (ImmutableBiMap<V, K>) this;
  }

  RegularImmutableBiMap(ImmutableMap<K, V> delegate) {
    super(delegate);

import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@code Entry} for {@link ImmutableMap} that adds extra methods to traverse hash
 * buckets for the key and the value. This allows reuse in {@link RegularImmutableMap} and {@link
 * RegularImmutableBiMap}, which don't have to recopy the entries created by their {@code Builder}
 * implementations.
 *

  }

  @SuppressWarnings("unchecked")
  @Override
  public @Nullable V get(@Nullable Object key) {
    Object result =
        RegularImmutableMap.get(keyHashTable, alternatingKeysAndValues, size, keyOffset, key);
    /*
     * We can't simply cast the result of `RegularImmutableMap.get` to V because of a bug in our
     * nullness checker (resulting from https://github.com/jspecify/checker-framework/issues/8).
     */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.ImmutableList.asImmutableList;
import static com.google.common.collect.RegularImmutableMap.makeImmutable;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import java.util.HashMap;

    Map<V, K> backwardDelegate = Maps.newHashMapWithExpectedSize(n);
    for (int i = 0; i < n; i++) {
      // requireNonNull is safe because the first `n` elements have been filled in.
      Entry<K, V> e = RegularImmutableMap.makeImmutable(requireNonNull(entryArray[i]));
      entryArray[i] = e;
      V oldValue = forwardDelegate.putIfAbsent(e.getKey(), e.getValue());
      if (oldValue != null) {