* Calls are leaked if the connection is tracking them but the application code has abandoned
   * them. Leak detection is imprecise and relies on garbage collection.
   */
  private fun pruneAndGetAllocationCount(
    connection: RealConnection,
    now: Long,
  ): Int {
    connection.lock.assertHeld()

    val references = connection.calls

        // This work was already done by calling lruEntries.get().
      }

      else -> throw IOException("unexpected journal line: $line")
    }
  }

  /**
   * Computes the initial size and collects garbage as a part of opening the cache. Dirty entries
   * are assumed to be inconsistent and will be deleted.
   */
  @Throws(IOException::class)
  private fun processJournal() {
    fileSystem.deleteIfExists(journalFileTmp)