/guava/guava/src/com/google/common/collect/RegularImmutableMultiset.java
int mask = hashTable.length <= 1;
int mask = hashTable.length - 1;
public int count(@CheckForNull Object element) { @Nullable ImmutableEntry<?>[] hashTable = this.hashTable; if (element == null || hashTable.length == 0) { return 0; } int hash = Hashing.smearedHash(element); <extra_id_0> for (ImmutableEntry<?> entry = hashTable[hash & mask]; entry != null; entry = entry.nextInBucket()) { if (Objects.equal(element, entry.getElement())) { return entry.getCount(); }