while (totalWeight > maxSegmentWeight) {
        ReferenceEntry<K, V> e = getNextEvictable();
        if (!removeEntry(e, e.getHash(), RemovalCause.SIZE)) {
          throw new AssertionError();
        }
      }
    }

    // TODO(fry): instead implement this with an eviction head
    @GuardedBy("this")
    ReferenceEntry<K, V> getNextEvictable() {
      for (ReferenceEntry<K, V> e : accessQueue) {