private fun readHeaderBlock(
    length: Int,
    padding: Int,
    flags: Int,
    streamId: Int,
  ): List<Header> {
    continuation.left = length
    continuation.length = continuation.left
    continuation.padding = padding
    continuation.flags = flags
    continuation.streamId = streamId

    // TODO: Concat multi-value headers with 0x0, except COOKIE, which uses 0x3B, 0x20.

import okhttp3.internal.http2.Http2.FLAG_END_STREAM
import okhttp3.internal.http2.Http2.FLAG_NONE
import okhttp3.internal.http2.Http2.INITIAL_MAX_FRAME_SIZE
import okhttp3.internal.http2.Http2.TYPE_CONTINUATION
import okhttp3.internal.http2.Http2.TYPE_DATA
import okhttp3.internal.http2.Http2.TYPE_GOAWAY
import okhttp3.internal.http2.Http2.TYPE_HEADERS
import okhttp3.internal.http2.Http2.TYPE_PING

    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected rsv1 flag")
    }
  }

  @Test fun reservedFlag1IsUnsupportedForContinuationFrames() {
    data.write("c000".decodeHex()) // Empty continuation, flag 1 set.
    assertFailsWith<ProtocolException> {
      clientReaderWithCompression.processNextFrame()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected rsv1 flag")
    }
  }

 *  Fix: Always configure NPN headers. This fixes connectivity to
    `https://facebook.com` when SPDY and HTTP/2 are both disabled. Otherwise an
    unexpected NPN response is received and OkHttp crashes.
 *  Fix: Write continuation frames when HPACK data is larger than 16383 bytes.
 *  Fix: Don't drop uncaught exceptions thrown in async calls.
 *  Fix: Throw an exception eagerly when a request body is not legal. Previously

        }
      }

      if (isFinalFrame) break // We are exhausted and have no continuations.

      readUntilNonControlFrame()
      if (opcode != OPCODE_CONTINUATION) {
        throw ProtocolException("Expected continuation opcode. Got: ${opcode.toHexString()}")
      }
    }
  }

  @Throws(IOException::class)
  override fun close() {
    messageInflater?.close()
  }

    frame.writeInt(expectedStreamId and 0x7fffffff)
    frame.write(headerBlock, Http2.INITIAL_MAX_FRAME_SIZE.toLong())

    // Write the continuation frame, specifying no more frames are expected.
    writeMedium(frame, headerBlock.size.toInt())
    frame.writeByte(Http2.TYPE_CONTINUATION)
    frame.writeByte(FLAG_END_HEADERS)
    frame.writeInt(expectedStreamId and 0x7fffffff)
    frame.writeAll(headerBlock)