*     }
 *     V result = value;
 *     value = null;
 *     notifyAll();
 *     return result;
 *   }
 *
 *   public synchronized void set(V newValue) throws InterruptedException {
 *     while (value != null) {
 *       wait();
 *     }
 *     value = newValue;
 *     notifyAll();
 *   }
 * }
 * }</pre>
 *
 * <h3>{@code ReentrantLock}</h3>
 *

	// Merge semantics replaces, rather than merges into existing entries.
	src.Range(func(k protoreflect.MapKey, v protoreflect.Value) bool {
		switch {
		case fd.Message() != nil:
			dstv := dst.NewValue()
			o.mergeMessage(dstv.Message(), v.Message())
			dst.Set(k, dstv)
		case fd.Kind() == protoreflect.BytesKind:
			dst.Set(k, o.cloneBytes(v))
		default:
			dst.Set(k, v)
		}
		return true
	})

      Entry<Cut<K>, RangeMapEntry<K, V>> entry = backingItr.next();
      V newValue = remappingFunction.apply(entry.getValue().getValue(), value);
      if (newValue == null) {
        backingItr.remove();
      } else {
        entry.setValue(
            new RangeMapEntry<K, V>(
                entry.getValue().getLowerBound(), entry.getValue().getUpperBound(), newValue));
      }
    }

    entriesByLowerBound.putAll(gaps.build());

      @ParametricNullness K key,
      boolean containedKey,
      @CheckForNull V oldValue,
      @ParametricNullness V newValue) {
    if (containedKey) {
      // The cast is safe because of the containedKey check.
      removeFromInverseMap(uncheckedCastNullableTToT(oldValue));
    }
    inverse.delegate.put(newValue, key);
  }

  @CanIgnoreReturnValue
  @Override
  @CheckForNull

                }
                throw MissingPropertyException(propertyName)
            }
            scriptReferenced()
        }

        override fun setProperty(propertyName: String, newValue: Any?) {
            // See above for why this check happens
            if (targetMetadata.hasProperty(null, propertyName) == null) {
                throw MissingPropertyException(propertyName)
            }

  }

  @CanIgnoreReturnValue
  @Override
  public boolean replace(K key, @CheckForNull V oldValue, V newValue) {
    checkNotNull(key);
    checkNotNull(newValue);
    if (oldValue == null) {
      return false;
    }
    int hash = hash(key);
    return segmentFor(hash).replace(key, hash, oldValue, newValue);
  }

  @CheckForNull
  @CanIgnoreReturnValue
  @Override

        Provider<? extends Iterable<? extends T>> newValue = transformation.transform(shallowCopy());
        if (newValue != null) {
            set(newValue);
        } else {
            set((Iterable<? extends T>) null);
        }
    }

    private class Configurer {

  }

  @CanIgnoreReturnValue
  @Override
  public boolean replace(K key, @CheckForNull V oldValue, V newValue) {
    checkNotNull(key);
    checkNotNull(newValue);
    if (oldValue == null) {
      return false;
    }
    int hash = hash(key);
    return segmentFor(hash).replace(key, hash, oldValue, newValue);
  }

  @CheckForNull
  @CanIgnoreReturnValue
  @Override

    return (K) keys[index];
  }

  int getValue(int index) {
    checkElementIndex(index, size);
    return values[index];
  }

  void setValue(int index, int newValue) {
    checkElementIndex(index, size);
    values[index] = newValue;
  }

  Entry<K> getEntry(int index) {
    checkElementIndex(index, size);
    return new MapEntry(index);
  }

  class MapEntry extends AbstractEntry<K> {

        Provider<? extends Map<? extends K, ? extends V>> newValue = transformation.transform(shallowCopy());
        if (newValue != null) {
            set(newValue);
        } else {
            set((Map<? extends K, ? extends V>) null);
        }
    }

    @Override
    protected String describeContents() {