}

  @Override
  public int degree(N node) {
    if (isDirected()) {
      return IntMath.saturatedAdd(predecessors(node).size(), successors(node).size());
    } else {
      Set<N> neighbors = adjacentNodes(node);
      int selfLoopCount = (allowsSelfLoops() && neighbors.contains(node)) ? 1 : 0;
      return IntMath.saturatedAdd(neighbors.size(), selfLoopCount);
    }
  }

  @Override
  public int inDegree(N node) {

      isParallel |= stream.isParallel();
      Spliterator<? extends T> splitr = stream.spliterator();
      splitrsBuilder.add(splitr);
      characteristics &= splitr.characteristics();
      estimatedSize = LongMath.saturatedAdd(estimatedSize, splitr.estimateSize());
    }
    return StreamSupport.stream(
            CollectSpliterators.flatMap(
                splitrsBuilder.build().spliterator(),

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.CollectPreconditions.checkNonnegative;
import static com.google.common.math.IntMath.saturatedAdd;
import static java.lang.Math.max;
import static java.lang.Math.min;
import static java.util.Arrays.asList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;

      }

      @Override
      public boolean isEmpty() {
        return multiset1.isEmpty() && multiset2.isEmpty();
      }

      @Override
      public int size() {
        return IntMath.saturatedAdd(multiset1.size(), multiset2.size());
      }

      @Override
      public int count(@Nullable Object element) {
        return multiset1.count(element) + multiset2.count(element);
      }

      }

      @Override
      public boolean isEmpty() {
        return multiset1.isEmpty() && multiset2.isEmpty();
      }

      @Override
      public int size() {
        return IntMath.saturatedAdd(multiset1.size(), multiset2.size());
      }

      @Override
      public int count(@Nullable Object element) {
        return multiset1.count(element) + multiset2.count(element);
      }

   *
   * @since 20.0
   */
  // Whenever both tests are cheap and functional, it's faster to use &, | instead of &&, ||
  @SuppressWarnings("ShortCircuitBoolean")
  public static long saturatedAdd(long a, long b) {
    long naiveSum = a + b;
    if ((a ^ b) < 0 | (a ^ naiveSum) >= 0) {
      // If a and b have different signs or a has the same sign as the result then there was no
      // overflow, return.