if (minCapacity * 2 > alternatingKeysAndValues.length) {
        alternatingKeysAndValues =
            Arrays.copyOf(
                alternatingKeysAndValues,
                ImmutableCollection.Builder.expandedCapacity(
                    alternatingKeysAndValues.length, minCapacity * 2));
        entriesUsed = false;
      }
    }

    /**

    }

    private void ensureCapacity(int minCapacity) {
      if (minCapacity > entries.length) {
        entries =
            Arrays.copyOf(
                entries, ImmutableCollection.Builder.expandedCapacity(entries.length, minCapacity));
        entriesUsed = false;
      }
    }

    /**
     * Associates {@code key} with {@code value} in the built map. If the same key is put more than