) {
      private val headerList = mutableListOf<Header>()
      private val source: BufferedSource = source.buffer()

      // Visible for testing.
      @JvmField var dynamicTable = arrayOfNulls<Header>(8)

      // Array is populated back to front, so new entries always have lowest index.
      private var nextHeaderIndex = dynamicTable.size - 1

      @JvmField var headerCount = 0

    val symbol: Int

    /** Number of bits represented in the terminal node. */
    val terminalBitCount: Int

    /** Construct an internal node. */
    constructor() {
      this.children = arrayOfNulls(256)
      this.symbol = 0 // Not read.
      this.terminalBitCount = 0 // Not read.
    }

    /** Construct a terminal node. */
    constructor(symbol: Int, bits: Int) {
      this.children = null

    return buffer
  }

  /** Create a sufficiently large header set to overflow INITIAL_MAX_FRAME_SIZE bytes.  */
  private fun largeHeaders(): List<Header> {
    val nameValues = arrayOfNulls<String>(32)
    val chars = CharArray(512)
    var i = 0
    while (i < nameValues.size) {
      Arrays.fill(chars, i.toChar())
      val string = String(chars)
      nameValues[i++] = string