text: import { ImmutableBuffer } from './immutableBuffer.js'
  
  const hello = 'Hello!'
  const immutable = new ImmutableBuffer(hello.length,
    ({ write }) => {
      write(hello)
    })
  
  console.log(String.fromCharCode(immutable.readInt8(0)))
  
  // the following line will throw
  // "TypeError: immutable.write is not a function"
  
  // immutable.write('Hello?')
  