A Transform stream is created with new Transform({ readableHighWaterMark: 5, writableHighWaterMark: 10, ... }). What is true about its two highWaterMark values?

const { Transform } = require('stream'); const t = new Transform({ readableHighWaterMark: 5, writableHighWaterMark: 10, transform(c, e, cb) { cb(); } }); console.log(t.readableHighWaterMark, t.writableHighWaterMark);