PassThrough {
  _readableState:
   ReadableState {
     objectMode: false,
     highWaterMark: 16384,
     buffer: BufferList { head: [Object], tail: [Object], length: 1 },
     length: 100219,
     pipes: null,
     pipesCount: 0,
     flowing: null,
     ended: true,
     endEmitted: false,
     reading: false,
     sync: false,
     needReadable: false,
     emittedReadable: true,
     readableListening: false,
     resumeScheduled: false,
     paused: true,
     emitClose: true,
     autoDestroy: false,
     destroyed: false,
     defaultEncoding: 'utf8',
     awaitDrain: 0,
     readingMore: true,
     decoder: null,
     encoding: null },
  readable: true,
  _events:
   [Object: null prototype] { prefinish: [Function: prefinish] },
  _eventsCount: 1,
  _maxListeners: undefined,
  _writableState:
   WritableState {
     objectMode: false,
     highWaterMark: 16384,
     finalCalled: false,
     needDrain: true,
     ending: true,
     ended: true,
     finished: false,
     destroyed: false,
     decodeStrings: true,
     defaultEncoding: 'utf8',
     length: 0,
     writing: false,
     corked: 0,
     sync: false,
     bufferProcessing: false,
     onwrite: [Function: bound onwrite],
     writecb: null,
     writelen: 0,
     bufferedRequest: null,
     lastBufferedRequest: null,
     pendingcb: 1,
     prefinished: true,
     errorEmitted: false,
     emitClose: true,
     autoDestroy: false,
     bufferedRequestCount: 0,
     corkedRequestsFree:
      { next: null,
        entry: null,
        finish: [Function: bound onCorkedFinish] } },
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  allowHalfOpen: true,
  _transformState:
   { afterTransform: [Function: bound afterTransform],
     needTransform: false,
     transforming: false,
     writecb: null,
     writechunk: null,
     writeencoding: 'buffer' } }