[QUESTION] model.get('toolbar') always return null

Hi @artf I am trying to add a custom toolbar to my custom component without changing the default toolbar. So I expect it to be like [movable, copyable, removable, newToolbar]. I use this #266 as a reference.

model: {
  // ...
  initToolbar () {
    const tb = this.get('toolbar')

    console.log(tb) // Return null
    tb.unshift({
      attributes: { class: 'fa fa-plane' },
      command: 'some-command'
    })

    this.set('toolbar', tb)
  },
  // ...
}

But strangely this.get('toolbar') always return null. Is this something normal?

I got this instead