}

  /**
   * Returns the empty multimap.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */
  // Casting is safe because the multimap will never hold any elements.
  @SuppressWarnings("unchecked")
  public static <K, V> ImmutableSetMultimap<K, V> of() {
    return (ImmutableSetMultimap<K, V>) EmptyImmutableSetMultimap.INSTANCE;

   * @param h hash code
   */
  static int rehash(int h) {
    // Spread bits to regularize both segment and index locations,
    // using variant of single-word Wang/Jenkins hash.
    // TODO(kevinb): use Hashing/move this to Hashing?
    h += (h << 15) ^ 0xffffcd7d;
    h ^= h >>> 10;
    h += h << 3;
    h ^= h >>> 6;
    h += (h << 2) + (h << 14);
    return h ^ (h >>> 16);
  }

  /**

C,YAAa,eACjBC,GAAI,CAAC3O,EAAS,UAAWA,EAAS,YAClC2I,EAAG,CAAC,WAAY,cAChBiG,GAAI,CAAC5O,EAAS,SAAUA,EAAS,YAErC,OAAO+f,EAAgBtlB,EAAOqE,GAAK,GAAKrE,EAAOqE,GAAK,GA6DxD,SAASkyB,GAAsBhxB,EAAQ+f,EAAejhB,EAAKomB,GACvD,IAAIzqB,EAAS,CACTM,EAAG,CAAC,cAAe,gBACnBsT,EAAG,CAAC,cAAe,gBACnBvD,EAAG,CAAC,UAAW,aACfyD,GAAI,CAACvO,EAAS,QAASA,EAAS,UAChCwO,EAAG,CAAC,aAAc,eAClBE,EAAG,CAAC,YAAa,eACjBC,GAAI,CAAC3O,EAAS,UAAWA,EAAS,YAClC2I,EAAG,CAAC,WAAY,cAChBiG,GAAI,CAAC5O,EAAS,SAAUA,EAAS,YAErC,OAAO+f,EAAgBtlB,EAAOqE,GAAK,GAA...

////

That command creates a new virtual environment in a directory called `.venv`.

/// details | `.venv` or other name

You could create the virtual environment in a different directory, but there's a convention of calling it `.venv`.

///

## Activate the Virtual Environment { #activate-the-virtual-environment }

Activate the new virtual environment so that any Python command you run or package you install uses it.

/// tip

   * type}, the distinct values of {@code type} can be passed as parameters to create {@code Foo}
   * instances that are unequal.
   *
   * <p>Calling {@code setDistinctValues(type, v1, v2)} also sets the default value for {@code type}
   * that's used for {@link #testNulls}.
   *
   * <p>Only necessary for types where {@link ClassSanityTester} doesn't already know how to create

        
        // Restore normal operation parameters
        // Verify all registrations are still valid
    }
}
```

## 9. Performance and Optimization

### 9.1 Witness Event Batching
```java
public class WitnessEventBatcher {
    private final Queue<WitnessNotification> pendingNotifications;
    private final ScheduledExecutorService scheduler;
    private final int batchSize = 10;

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.CollectPreconditions.checkNonnegative;
import static com.google.common.collect.Hashing.smearedHash;
import static com.google.common.collect.NullnessCasts.uncheckedCastNullableTToT;
import static com.google.common.collect.NullnessCasts.unsafeNull;

import com.google.common.annotations.GwtCompatible;

     * multiset.
     *
     * Most code that operates on an AvlNode never operates on the header node. Such code can access
     * the elem field without a null check by calling getElement().
     */
    private final @Nullable E elem;

    // elemCount is 0 iff this node has been deleted.
    private int elemCount;

    private int distinctElements;
    private long totalCount;

   * @param h hash code
   */
  static int rehash(int h) {
    // Spread bits to regularize both segment and index locations,
    // using variant of single-word Wang/Jenkins hash.
    // TODO(kevinb): use Hashing/move this to Hashing?
    h += (h << 15) ^ 0xffffcd7d;
    h ^= h >>> 10;
    h += h << 3;
    h ^= h >>> 6;
    h += (h << 2) + (h << 14);
    return h ^ (h >>> 16);
  }

  /**

   *
   * <p>The resulting stream will only be as long as the shorter of the two input streams; if one
   * stream is longer, its extra elements will be ignored.
   *
   * <p>Note that if you are calling {@link Stream#forEach} on the resulting stream, you might want
   * to consider using {@link #forEachPair} instead of this method.
   *
   * <p><b>Performance note:</b> The resulting stream is not <a