old_contents: 
  
  import CanvasView from 'demoPage/views/CanvasView';
  
  export default function () {
      const model = new Backbone.Model({
          numberValue: 42
      });
  
      model.on('change', (model) => console.log(model.changed));
  
      return new CanvasView({
          view: new core.form.editors.NumberEditor({
              model,
              key: 'numberValue',
              changeMode: 'keydown',
              autocommit: true,
              min: -300,
              allowFloat: true,
              max: 300,
              step: 3,
              intlOptions: {
                  useGrouping: false
              }
          }),
          presentation: '{{numberValue}}',
          isEditor: true
      });
  }
  
new_contents: 
  
  import CanvasView from 'demoPage/views/CanvasView';
  
  export default function () {
      const model = new Backbone.Model({
          numberValue: 42
      });
  
      return new CanvasView({
          view: new core.form.editors.NumberEditor({
              model,
              key: 'numberValue',
              changeMode: 'keydown',
              autocommit: true,
              min: -300,
              allowFloat: true,
              max: 300,
              step: 3,
              intlOptions: {
                  useGrouping: false
              }
          }),
          presentation: '{{numberValue}}',
          isEditor: true
      });
  }
  
subject: delete trash in log