QUESTION: adding traits are not picked up by trait manager.

Following example from docs .

Is there further configurtion to make new traitsa show for elements? The example using the input does not run, My id's are being picked up but not the additional attributes.

 // try adding traits

  editor.DomComponents.addType('ol', {
    isComponent: el => el.tagName == 'OL',
    model: {
      defaults: {
        traits: [

          {
            type: 'select', // Type of the trait
            label: 'Type', // The label you will see in Settings
            name: 'type', // The name of the attribute/property to use on component
            options: [
              { id: '1', name: 'Numbers'},
              { id: 'a', name: 'Alphabetically lower'},
              { id: 'A', name: 'Alphabetically upper'},
              { id: 'i', name: 'Roman lower'},
              { id: 'I', name: 'Roman upper'},
            ]
          }, {
            type: 'number',
            name: 'start',
        }],
        // As by default, traits are binded to attributes, so to define
        // their initial value we can use attributes
        attributes: { type: '1', start: 1 },
      },
    },
});